Abstract

A narrow-band, extreme-ultraviolet laser source is developed that has continuous tunability in the range 96–97.5 nm and a bandwidth below 250 MHz. The versatility of the radiation source is demonstrated in two applications. Accurate values for lifetimes of highly excited molecular quantum states are determined from line-broadening measurements in three electronic states of CO: W1, v=0 state (f components, J=13), τ=130±10 ps; L1, v=0 state (f components, J=16), τ=1.0±0.3 ns; and K1+, v=0 state (J=03), τ=54±5 ps. The application of the source in metrology in the extreme-ultraviolet domain is demonstrated by the highly accurate, absolute calibration of narrow resonances in CO. These molecular lines can be used for future reference standards at these short wavelengths. From accurately determined minute frequency shifts near the accidentally predissociated Jf=7 level of the L1, v=0 state the perturber state is characterized as a yet unidentified Rydberg state with an origin at 103 266.92 cm-1. It is demonstrated that molecular spectroscopy in the extreme-ultraviolet domain at megahertz precision is possible.

© 1997 Optical Society of America

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    [CrossRef]
  2. M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
    [CrossRef]
  3. T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
    [CrossRef] [PubMed]
  4. P. F. Levelt, W. Ubachs, and W. Hogervorst, “Extreme ultraviolet laser spectroscopy on CO in the 91–100 nmrange,” J. Chem. Phys. 97, 7160 (1992).
    [CrossRef]
  5. K. S. E. Eikema, W. Ubachs, and W. Hogervorst, “Isotope shift in the neon ground state by extreme ultraviolet laserspectroscopy at 74 nm.” Phys. Rev. A 49, 803 (1994).
    [CrossRef] [PubMed]
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  8. D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
    [CrossRef] [PubMed]
  9. R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
    [CrossRef]
  10. K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
    [CrossRef] [PubMed]
  11. K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
    [CrossRef]
  12. E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
    [CrossRef]
  13. S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
    [CrossRef]
  14. C. Sansonetti, “Precise measurements of hyperfine components in the spectrum of moleculariodine,” J. Opt. Soc. Am. B 14, 1913 (1997).
    [CrossRef]
  15. Th. D. Varberg and K. M. Evenson, “Accurate far-infrared rotational frequencies of carbon monoxide,” Astrophys. J. 385, 763 (1992).
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  16. K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “On the determination of a heterogeneous vs a homogeneous perturbationin the spectrum of a diatomic molecule: the K1Σ+, v=0 state of 13C18O,” J. Mol. Spectrosc. 163, 19 (1994).
    [CrossRef]
  17. C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
    [CrossRef]
  18. M. Eidelsberg and F. Rostas, “Spectroscopic, absorption and photodissociation data for CO and isotopicspecies between 91 and 115 nm,” Astron. Astrophys. 235, 472 (1990).
  19. P. C. Cacciani, W. Hogervorst, and W. Ubachs, “Accidental predissociation phenomena in the E1Π, v=0 and v=1 states of 12C16Oand 13C16O,” J. Chem. Phys. 102, 8308 (1995).
    [CrossRef]
  20. W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
    [CrossRef]
  21. G. L. Wolk and J. W. Rich, “Observation of a new electronic state of carbon monoxide using LIFon highly vibrationally excited CO(X1Σ+),” J. Chem. Phys. 79, 12 (1983).
    [CrossRef]
  22. W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
    [CrossRef]
  23. D. L. Cooper and K. Kirby, “Theoretical study of the (3sσ)1ΠRydberg state of CO,” Chem. Phys. Lett. 152, 393 (1988).
    [CrossRef]
  24. K. Kirby, M. E. Rosenkrantz, and D. L. Cooper, “Population of long-lived vibrational levels of CO: I1Σ and D1Δ,” Phys. Rev. Lett. 68, 3865 (1992).
    [CrossRef] [PubMed]
  25. M. Hiyama and H. Nakamura, “Superexcited states of CO near the first ionization threshold,” Chem. Phys. Lett. 248, 316 (1996).
    [CrossRef]
  26. F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
    [CrossRef]
  27. M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
    [CrossRef] [PubMed]
  28. E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
    [CrossRef] [PubMed]

1997 (2)

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
[CrossRef]

C. Sansonetti, “Precise measurements of hyperfine components in the spectrum of moleculariodine,” J. Opt. Soc. Am. B 14, 1913 (1997).
[CrossRef]

1996 (2)

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
[CrossRef] [PubMed]

M. Hiyama and H. Nakamura, “Superexcited states of CO near the first ionization threshold,” Chem. Phys. Lett. 248, 316 (1996).
[CrossRef]

1995 (2)

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

P. C. Cacciani, W. Hogervorst, and W. Ubachs, “Accidental predissociation phenomena in the E1Π, v=0 and v=1 states of 12C16Oand 13C16O,” J. Chem. Phys. 102, 8308 (1995).
[CrossRef]

1994 (6)

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “On the determination of a heterogeneous vs a homogeneous perturbationin the spectrum of a diatomic molecule: the K1Σ+, v=0 state of 13C18O,” J. Mol. Spectrosc. 163, 19 (1994).
[CrossRef]

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “Predissociation rates in carbon monoxide: dependence on rotationalstate, parity and isotope,” Chem. Phys. 181, 217 (1994).
[CrossRef]

K. S. E. Eikema, W. Ubachs, and W. Hogervorst, “Isotope shift in the neon ground state by extreme ultraviolet laserspectroscopy at 74 nm.” Phys. Rev. A 49, 803 (1994).
[CrossRef] [PubMed]

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

1993 (2)

M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
[CrossRef]

D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
[CrossRef] [PubMed]

1992 (4)

P. F. Levelt, W. Ubachs, and W. Hogervorst, “Extreme ultraviolet laser spectroscopy on CO in the 91–100 nmrange,” J. Chem. Phys. 97, 7160 (1992).
[CrossRef]

Th. D. Varberg and K. M. Evenson, “Accurate far-infrared rotational frequencies of carbon monoxide,” Astrophys. J. 385, 763 (1992).
[CrossRef]

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

K. Kirby, M. E. Rosenkrantz, and D. L. Cooper, “Population of long-lived vibrational levels of CO: I1Σ and D1Δ,” Phys. Rev. Lett. 68, 3865 (1992).
[CrossRef] [PubMed]

1990 (2)

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

M. Eidelsberg and F. Rostas, “Spectroscopic, absorption and photodissociation data for CO and isotopicspecies between 91 and 115 nm,” Astron. Astrophys. 235, 472 (1990).

1989 (2)

E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
[CrossRef]

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

1988 (2)

S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
[CrossRef]

D. L. Cooper and K. Kirby, “Theoretical study of the (3sσ)1ΠRydberg state of CO,” Chem. Phys. Lett. 152, 393 (1988).
[CrossRef]

1987 (1)

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

1983 (2)

G. L. Wolk and J. W. Rich, “Observation of a new electronic state of carbon monoxide using LIFon highly vibrationally excited CO(X1Σ+),” J. Chem. Phys. 79, 12 (1983).
[CrossRef]

L. Hlousek and W. H. Fairbank, “High-accuracy wavenumber measurements in molecular iodine,” Opt. Lett. 8, 322 (1983).
[CrossRef] [PubMed]

Adachi, Y.

S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
[CrossRef]

Benharrous, M.

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

Biraben, F.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Blaes, C.

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

Bönsch, G.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Breton, J.

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

Cacciani, P. C.

P. C. Cacciani, W. Hogervorst, and W. Ubachs, “Accidental predissociation phenomena in the E1Π, v=0 and v=1 states of 12C16Oand 13C16O,” J. Chem. Phys. 102, 8308 (1995).
[CrossRef]

Cook, B. M.

D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
[CrossRef] [PubMed]

Cooper, D. L.

K. Kirby, M. E. Rosenkrantz, and D. L. Cooper, “Population of long-lived vibrational levels of CO: I1Σ and D1Δ,” Phys. Rev. Lett. 68, 3865 (1992).
[CrossRef] [PubMed]

D. L. Cooper and K. Kirby, “Theoretical study of the (3sσ)1ΠRydberg state of CO,” Chem. Phys. Lett. 152, 393 (1988).
[CrossRef]

Cromwell, E.

E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
[CrossRef]

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

Dickopf, S.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Drabbels, M.

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
[CrossRef]

Eidelsberg, M.

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

M. Eidelsberg and F. Rostas, “Spectroscopic, absorption and photodissociation data for CO and isotopicspecies between 91 and 115 nm,” Astron. Astrophys. 235, 472 (1990).

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

Eikema, K. S. E.

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
[CrossRef]

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
[CrossRef] [PubMed]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “Predissociation rates in carbon monoxide: dependence on rotationalstate, parity and isotope,” Chem. Phys. 181, 217 (1994).
[CrossRef]

K. S. E. Eikema, W. Ubachs, and W. Hogervorst, “Isotope shift in the neon ground state by extreme ultraviolet laserspectroscopy at 74 nm.” Phys. Rev. A 49, 803 (1994).
[CrossRef] [PubMed]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “On the determination of a heterogeneous vs a homogeneous perturbationin the spectrum of a diatomic molecule: the K1Σ+, v=0 state of 13C18O,” J. Mol. Spectrosc. 163, 19 (1994).
[CrossRef]

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

Evenson, K. M.

Th. D. Varberg and K. M. Evenson, “Accurate far-infrared rotational frequencies of carbon monoxide,” Astrophys. J. 385, 763 (1992).
[CrossRef]

Eyler, E. E.

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

Fairbank, W. H.

Gilligan, J.

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

Gilligan, J. M.

D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
[CrossRef] [PubMed]

Grieser, R.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Hänsch, T. W.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Heinze, J.

M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
[CrossRef]

Hirose, C.

S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
[CrossRef]

Hiyama, M.

M. Hiyama and H. Nakamura, “Superexcited states of CO near the first ionization threshold,” Chem. Phys. Lett. 248, 316 (1996).
[CrossRef]

Hlousek, L.

Hogervorst, W.

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
[CrossRef]

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
[CrossRef] [PubMed]

P. C. Cacciani, W. Hogervorst, and W. Ubachs, “Accidental predissociation phenomena in the E1Π, v=0 and v=1 states of 12C16Oand 13C16O,” J. Chem. Phys. 102, 8308 (1995).
[CrossRef]

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “On the determination of a heterogeneous vs a homogeneous perturbationin the spectrum of a diatomic molecule: the K1Σ+, v=0 state of 13C18O,” J. Mol. Spectrosc. 163, 19 (1994).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “Predissociation rates in carbon monoxide: dependence on rotationalstate, parity and isotope,” Chem. Phys. 181, 217 (1994).
[CrossRef]

K. S. E. Eikema, W. Ubachs, and W. Hogervorst, “Isotope shift in the neon ground state by extreme ultraviolet laserspectroscopy at 74 nm.” Phys. Rev. A 49, 803 (1994).
[CrossRef] [PubMed]

P. F. Levelt, W. Ubachs, and W. Hogervorst, “Extreme ultraviolet laser spectroscopy on CO in the 91–100 nmrange,” J. Chem. Phys. 97, 7160 (1992).
[CrossRef]

Huber, A.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Huber, G.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Huber, K. P.

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

Julien, L.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Julienne, P. S.

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

Kirby, K.

K. Kirby, M. E. Rosenkrantz, and D. L. Cooper, “Population of long-lived vibrational levels of CO: I1Σ and D1Δ,” Phys. Rev. Lett. 68, 3865 (1992).
[CrossRef] [PubMed]

D. L. Cooper and K. Kirby, “Theoretical study of the (3sσ)1ΠRydberg state of CO,” Chem. Phys. Lett. 152, 393 (1988).
[CrossRef]

Klein, R.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Kung, A.

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
[CrossRef]

Launay, F.

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

Lee, Y. T.

E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
[CrossRef]

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

Leibfried, D.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Letzelter, C.

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

Levelt, P. F.

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

P. F. Levelt, W. Ubachs, and W. Hogervorst, “Extreme ultraviolet laser spectroscopy on CO in the 91–100 nmrange,” J. Chem. Phys. 97, 7160 (1992).
[CrossRef]

Lichten, W.

D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
[CrossRef] [PubMed]

Masaki, T.

S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
[CrossRef]

McCormack, E.

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

Meerts, W. L.

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
[CrossRef]

Merz, P.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Nakamura, H.

M. Hiyama and H. Nakamura, “Superexcited states of CO near the first ionization threshold,” Chem. Phys. Lett. 248, 316 (1996).
[CrossRef]

Nicolaus, A.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Nussenzweig, A.

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

Pachucki, K.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Pollack, E.

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

Rich, J. W.

G. L. Wolk and J. W. Rich, “Observation of a new electronic state of carbon monoxide using LIFon highly vibrationally excited CO(X1Σ+),” J. Chem. Phys. 79, 12 (1983).
[CrossRef]

Robbe, J. M.

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

Rosenkrantz, M. E.

K. Kirby, M. E. Rosenkrantz, and D. L. Cooper, “Population of long-lived vibrational levels of CO: I1Σ and D1Δ,” Phys. Rev. Lett. 68, 3865 (1992).
[CrossRef] [PubMed]

Rostas, F.

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

M. Eidelsberg and F. Rostas, “Spectroscopic, absorption and photodissociation data for CO and isotopicspecies between 91 and 115 nm,” Astron. Astrophys. 235, 472 (1990).

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

Sansonetti, C.

Schmidt-Kaler, F.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Schnatz, H.

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Sekine, S.

S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
[CrossRef]

Shiner, D.

D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
[CrossRef] [PubMed]

Tchang-Brillet, W.

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

ter Meulen, J. J.

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
[CrossRef]

Thieblemont, B.

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

Trickl, T.

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
[CrossRef]

Ubachs, W.

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
[CrossRef]

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
[CrossRef] [PubMed]

P. C. Cacciani, W. Hogervorst, and W. Ubachs, “Accidental predissociation phenomena in the E1Π, v=0 and v=1 states of 12C16Oand 13C16O,” J. Chem. Phys. 102, 8308 (1995).
[CrossRef]

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “On the determination of a heterogeneous vs a homogeneous perturbationin the spectrum of a diatomic molecule: the K1Σ+, v=0 state of 13C18O,” J. Mol. Spectrosc. 163, 19 (1994).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “Predissociation rates in carbon monoxide: dependence on rotationalstate, parity and isotope,” Chem. Phys. 181, 217 (1994).
[CrossRef]

K. S. E. Eikema, W. Ubachs, and W. Hogervorst, “Isotope shift in the neon ground state by extreme ultraviolet laserspectroscopy at 74 nm.” Phys. Rev. A 49, 803 (1994).
[CrossRef] [PubMed]

P. F. Levelt, W. Ubachs, and W. Hogervorst, “Extreme ultraviolet laser spectroscopy on CO in the 91–100 nmrange,” J. Chem. Phys. 97, 7160 (1992).
[CrossRef]

Varberg, Th. D.

Th. D. Varberg and K. M. Evenson, “Accurate far-infrared rotational frequencies of carbon monoxide,” Astrophys. J. 385, 763 (1992).
[CrossRef]

Vassen, W.

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
[CrossRef]

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
[CrossRef] [PubMed]

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Vrakking, M. J. J.

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

Weitz, M.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Wolk, G. L.

G. L. Wolk and J. W. Rich, “Observation of a new electronic state of carbon monoxide using LIFon highly vibrationally excited CO(X1Σ+),” J. Chem. Phys. 79, 12 (1983).
[CrossRef]

Zimmerman, C.

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

Astron. Astrophys. (1)

M. Eidelsberg and F. Rostas, “Spectroscopic, absorption and photodissociation data for CO and isotopicspecies between 91 and 115 nm,” Astron. Astrophys. 235, 472 (1990).

Astrophys. J. (1)

Th. D. Varberg and K. M. Evenson, “Accurate far-infrared rotational frequencies of carbon monoxide,” Astrophys. J. 385, 763 (1992).
[CrossRef]

Astrophys. J. Lett. (1)

W. Ubachs, K. S. E. Eikema, P. F. Levelt, W. Hogervorst, M. Drabbels, W. L. Meerts, and J. J. ter Meulen, “Accurate determination of predissociation rates and transition frequenciesof carbon monoxide,” Astrophys. J. Lett. 427, L55 (1994).
[CrossRef]

Can. J. Phys. (1)

F. Rostas, F. Launay, M. Eidelsberg, M. Benharrous, C. Blaes, and K. P. Huber, “Extreme UV absorption spectroscopy of CO isotopomers in pulsed supersonicfree jet expansions,” Can. J. Phys. 72, 913 (1994).
[CrossRef]

Chem. Phys. (2)

C. Letzelter, M. Eidelsberg, F. Rostas, J. Breton, and B. Thieblemont, “Photoabsorption and photodissociation cross sections of CO between88.5 and 115 nm,” Chem. Phys. 114, 273 (1990).
[CrossRef]

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “Predissociation rates in carbon monoxide: dependence on rotationalstate, parity and isotope,” Chem. Phys. 181, 217 (1994).
[CrossRef]

Chem. Phys. Lett. (2)

M. Hiyama and H. Nakamura, “Superexcited states of CO near the first ionization threshold,” Chem. Phys. Lett. 248, 316 (1996).
[CrossRef]

D. L. Cooper and K. Kirby, “Theoretical study of the (3sσ)1ΠRydberg state of CO,” Chem. Phys. Lett. 152, 393 (1988).
[CrossRef]

J. Chem. Phys. (6)

G. L. Wolk and J. W. Rich, “Observation of a new electronic state of carbon monoxide using LIFon highly vibrationally excited CO(X1Σ+),” J. Chem. Phys. 79, 12 (1983).
[CrossRef]

W. Tchang-Brillet, P. S. Julienne, J. M. Robbe, C. Letzelter, and F. Rostas, “A model of the B1Σ+–D′1Σ+ Rydberg-valence predissociatinginteraction in the CO molecule,” J. Chem. Phys. 96, 6735 (1992).
[CrossRef]

M. Drabbels, J. Heinze, J. J. ter Meulen, and W. L. Meerts, “High resolution double-resonance spectroscopy on Rydberg states ofCO,” J. Chem. Phys. 99, 5701 (1993).
[CrossRef]

P. F. Levelt, W. Ubachs, and W. Hogervorst, “Extreme ultraviolet laser spectroscopy on CO in the 91–100 nmrange,” J. Chem. Phys. 97, 7160 (1992).
[CrossRef]

P. C. Cacciani, W. Hogervorst, and W. Ubachs, “Accidental predissociation phenomena in the E1Π, v=0 and v=1 states of 12C16Oand 13C16O,” J. Chem. Phys. 102, 8308 (1995).
[CrossRef]

S. Sekine, T. Masaki, Y. Adachi, and C. Hirose, “Optogalvanic spectrum of CO. II. The rotational structure of the L1Π state,” J. Chem. Phys. 89, 3951 (1988).
[CrossRef]

J. Mol. Spectrosc. (1)

K. S. E. Eikema, W. Hogervorst, and W. Ubachs, “On the determination of a heterogeneous vs a homogeneous perturbationin the spectrum of a diatomic molecule: the K1Σ+, v=0 state of 13C18O,” J. Mol. Spectrosc. 163, 19 (1994).
[CrossRef]

J. Opt. Soc. Am. B (1)

Opt. Lett. (1)

Phys. Rev. A (6)

D. Shiner, J. M. Gilligan, B. M. Cook, and W. Lichten, “H2, D2, and HD ionization potentialsby accurate calibration of several iodine lines,” Phys. Rev. A 47, 4042 (1993).
[CrossRef] [PubMed]

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Lamb shift measurements in the 11S groundstate of helium,” Phys. Rev. A 55, 1866 (1997).
[CrossRef]

K. S. E. Eikema, W. Ubachs, and W. Hogervorst, “Isotope shift in the neon ground state by extreme ultraviolet laserspectroscopy at 74 nm.” Phys. Rev. A 49, 803 (1994).
[CrossRef] [PubMed]

T. Trickl, M. J. J. Vrakking, E. Cromwell, Y. T. Lee, and A. Kung, “Ultra-high resolution (1+1) photoionization spectroscopyof Kr I: hyperfine structures, isotope shifts, and lifetimesfor the n=5, 6, 7 4p5ns Rydberglevels,” Phys. Rev. A 39, 2948 (1989).
[CrossRef] [PubMed]

M. Weitz, A. Huber, F. Schmidt-Kaler, D. Leibfried, W. Vassen, C. Zimmerman, K. Pachucki, T. W. Hänsch, L. Julien, and F. Biraben, “Precision measurement of the 1S ground-state Lambshift in atomic hydrogen and deuterium by frequency comparison,” Phys. Rev. A 52, 2664 (1995).
[CrossRef] [PubMed]

E. E. Eyler, J. Gilligan, E. McCormack, A. Nussenzweig, and E. Pollack, “Precise two-photon spectroscopy of EF–X intervalsin H2,” Phys. Rev. A 36, 3486 (1987).
[CrossRef] [PubMed]

Phys. Rev. Lett. (2)

K. Kirby, M. E. Rosenkrantz, and D. L. Cooper, “Population of long-lived vibrational levels of CO: I1Σ and D1Δ,” Phys. Rev. Lett. 68, 3865 (1992).
[CrossRef] [PubMed]

K. S. E. Eikema, W. Ubachs, W. Vassen, and W. Hogervorst, “Precision measurement in helium at 58 nm: the ground state Lamb shiftand the 11S–21P transitionisotope shift,” Phys. Rev. Lett. 76, 1216 (1996).
[CrossRef] [PubMed]

Rev. Sci. Instrum. (1)

E. Cromwell, T. Trickl, Y. T. Lee, and A. Kung, “Ultranarrow bandwidth VUV–XUV laser system,” Rev. Sci. Instrum. 60, 2888 (1989).
[CrossRef]

Z. Phys. A (1)

R. Grieser, G. Bönsch, S. Dickopf, G. Huber, R. Klein, P. Merz, A. Nicolaus, and H. Schnatz, “Precision measurement of two iodine lines at 585 nm and 549 nm,” Z. Phys. A 348, 147 (1994).
[CrossRef]

Other (1)

S. Gerstenkorn and P. Luc, Atlas du Spectred'Absorption de la Molecule de l'Iode Entre 14800–20000 cm−1 (CNRS, Paris, 1978).

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Figures (5)

Fig. 1
Fig. 1

Schematic of the experimental setup. Overlapping XUV and UV beams perpendicularly intersect a pulsed beam of CO. Ions produced in the interaction zone are accelerated by a pulsed electric field (delayed after the laser pulse) and detected on an electron multiplier (EM). The part within the rectangle in the lower right is in vacuum. The acousto-optic modulator (AOM) shifts the carrier frequency by 250 MHz for analysis of the chirp (see text); the electro-optic modulator (EOM) induces phase changes in the seed beam to compensate for chirp effects. The upper part shows the setup for I2 saturation spectroscopy. DM, dichroic mirrors; PV, pulsed valve; KD*P, frequency doubling crystal; PD, photodiodes.

Fig. 2
Fig. 2

Spectrum of the R(0) transition of the K1+X1+(0, 0) band of CO recorded by 1XUV+1UV photoionization at λ=97.03 nm. Etalon markers (in the middle panel) and an I2 saturation spectrum (lower panel) are on-line recorded with the output of the cw ring dye laser.

Fig. 3
Fig. 3

Spectrum of separately recorded Q(1) and Q(2) lines of the W1X1+(0, 0) band of CO recorded by 1XUV+1UV photoionization at λ=97.27 nm. Also shown are transmission fringes of a stabilized etalon used for the determination of the linewidths.

Fig. 4
Fig. 4

Excitation spectrum of the L1X1+(0, 0) band of CO in the bandhead region of the Q branch by 1XUV+1UV photoionization at λ=96.83 nm, recorded in three separate overlapping scans. Note that the Q(7) line is missing.

Fig. 5
Fig. 5

Spectrum of the Q(1) line of the L1X1+(0, 0) band of CO recorded simultaneously with a Doppler-free I2 spectrum and an etalon spectrum. This spectrum was recorded from a pure CO beam, without use of the EOM for chirp compensation. The absolute frequency of the Q(1) line is calibrated with respect to the I2 line marked by an asterisk at 17 211.96456(20) cm-1.

Tables (5)

Tables Icon

Table 1 Observed Linewidths δνobs, Derived Natural Widths Γ, and Calculated Natural Lifetimes τ for Various States in CO

Tables Icon

Table 2 I2 Hyperfine Components Calibrated in the Present Studya

Tables Icon

Table 3 Observed and Calculated Line Positions (in cm-1) of the Q Lines of the (4pπ) L1X1+ (0,0) Band of  12C16O at λ=96.83 nma

Tables Icon

Table 4 Frequency Separations between Q Lines of the LX (0, 0) Band of CO and Deviations from a Least-Squares Fita

Tables Icon

Table 5 Molecular Constants for f Components of the L1, v=0 State, Resulting from a Least-Squares Fit Including All Data from Tables 3 and 4a

Metrics