Abstract

Simultaneous detection of the optogalvanic effect and of the laser-induced intensity variations in emission lines in a uranium hollow-cathode discharge show that a part of the absorbed laser energy is transferred to all the species in the lamp by means of electron collisions. This transfer results in a global heating of the plasma and in an increase of ion and atom densities. From the measured nonisotopic selectivity of ion production associated with the optogalvanic effect, we conclude that impedance changes in the discharge are essentially due to the heating of the plasma. It follows that the optogalvanic effect is not a suitable scheme for isotopic enrichment by cataphoresis.

© 1982 Optical Society of America

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  1. C. Demuynck and J. L. Destombes, "Optogalvanic spectrum of molecular iodine," IEEE J. Quantum Electron. QE-17, 575–577 (1981).
  2. P. Camus, M. Dieulin, and C. Morillon, "Optogalvanic detection of barium high-lying levels with a two-step pulsed laser excitation," J. Phys. (Paris) 40, L513–L517 (1979).
  3. E. F. Zalewski, R. A. Keller, and C. T. Apel, "Optogalvanic effect as a detector for intracavity atomic absorption in a cw dye laser," Appl. Opt. 20, 1584–1587 (1981).
  4. R. A. Keller and E. F. Zalewski, "Noise considerations, signal magnitudes and detection limits in a hollow cathode discharge by optogalvanic spectroscopy," Appl. Opt. 19, 3301–3305 (1980).
  5. W. B. Bridges, "Characteristics of an optogalvanic effect in cesium and other gas discharge plasmas," J. Opt. Soc. Am. 68, 352–360 (1978).
  6. D. M. Pepper, "Analysis of the optogalvanic effect in discharge plasmas using rate equations in a modified Schottky formalism," IEEE J. Quantum Electron. QE-14, 971–977 (1978).
  7. J. M. Gagné, B. Mongeau, B. Leblanc, J. P. Saint-Dizier, P. Pianarosa, and L. Bertrand, "Production de vapeur d'uranium par pulverisation cathodique dans une cathode creuse: efficacités relatives des gaz Ne, Ar, Kr et concentration A l'état 5L06," Appl. Opt. 17, 2507–2510 (1978).
  8. R. A. Keller, R. Engleman, Jr., and E. F. Zalewski, "Opto-galvanic spectroscopy in a uranium hollow cathode discharge," J. Opt. Soc. Am. 69, 738–742 (1979).
  9. C. S. Willett, Introduction to Gas Lasers: Population Inversion Mechanism (Pergamon, New York, 1974).
  10. Y. Demers, Master's Degree thesis (Ecole Polytechnique, Montréal, 1980).
  11. J. Blaise and L. J. Radziemski, Jr., "Energy levels of neutral atomic uranium (U I)," J. Opt. Soc. Am. 66, 644–659 (1976).
  12. S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).
  13. D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).
  14. S. Sinha and J. N. Bardsley, "Symmetric charge transfer in low-energy ion-atom collisions," Phys. Rev. A 14, 104–113 (1976).

1981 (2)

C. Demuynck and J. L. Destombes, "Optogalvanic spectrum of molecular iodine," IEEE J. Quantum Electron. QE-17, 575–577 (1981).

E. F. Zalewski, R. A. Keller, and C. T. Apel, "Optogalvanic effect as a detector for intracavity atomic absorption in a cw dye laser," Appl. Opt. 20, 1584–1587 (1981).

1980 (1)

1979 (2)

R. A. Keller, R. Engleman, Jr., and E. F. Zalewski, "Opto-galvanic spectroscopy in a uranium hollow cathode discharge," J. Opt. Soc. Am. 69, 738–742 (1979).

P. Camus, M. Dieulin, and C. Morillon, "Optogalvanic detection of barium high-lying levels with a two-step pulsed laser excitation," J. Phys. (Paris) 40, L513–L517 (1979).

1978 (3)

1976 (2)

S. Sinha and J. N. Bardsley, "Symmetric charge transfer in low-energy ion-atom collisions," Phys. Rev. A 14, 104–113 (1976).

J. Blaise and L. J. Radziemski, Jr., "Energy levels of neutral atomic uranium (U I)," J. Opt. Soc. Am. 66, 644–659 (1976).

1973 (1)

S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).

Apel, C. T.

Bardsley, J. N.

S. Sinha and J. N. Bardsley, "Symmetric charge transfer in low-energy ion-atom collisions," Phys. Rev. A 14, 104–113 (1976).

Bauche-Arnoult, Cl.

S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).

Bertrand, L.

Blaise, J.

J. Blaise and L. J. Radziemski, Jr., "Energy levels of neutral atomic uranium (U I)," J. Opt. Soc. Am. 66, 644–659 (1976).

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Bridges, W. B.

Camus, P.

P. Camus, M. Dieulin, and C. Morillon, "Optogalvanic detection of barium high-lying levels with a two-step pulsed laser excitation," J. Phys. (Paris) 40, L513–L517 (1979).

Cowan, R. D.

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Demers, Y.

Y. Demers, Master's Degree thesis (Ecole Polytechnique, Montréal, 1980).

Demuynck, C.

C. Demuynck and J. L. Destombes, "Optogalvanic spectrum of molecular iodine," IEEE J. Quantum Electron. QE-17, 575–577 (1981).

Destombes, J. L.

C. Demuynck and J. L. Destombes, "Optogalvanic spectrum of molecular iodine," IEEE J. Quantum Electron. QE-17, 575–577 (1981).

Dieulin, M.

P. Camus, M. Dieulin, and C. Morillon, "Optogalvanic detection of barium high-lying levels with a two-step pulsed laser excitation," J. Phys. (Paris) 40, L513–L517 (1979).

Engleman, Jr., R.

Gagné, J. M.

Gerstenkorn, S.

S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).

Guelachvili, G.

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Keller, R. A.

Leblanc, B.

Luc, P.

S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).

Merle, D.

S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).

Mongeau, B.

Morillon, C.

P. Camus, M. Dieulin, and C. Morillon, "Optogalvanic detection of barium high-lying levels with a two-step pulsed laser excitation," J. Phys. (Paris) 40, L513–L517 (1979).

Osman, Z. Ben

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Pepper, D. M.

D. M. Pepper, "Analysis of the optogalvanic effect in discharge plasmas using rate equations in a modified Schottky formalism," IEEE J. Quantum Electron. QE-14, 971–977 (1978).

Pianarosa, P.

Radziemski, Jr., L. J.

J. Blaise and L. J. Radziemski, Jr., "Energy levels of neutral atomic uranium (U I)," J. Opt. Soc. Am. 66, 644–659 (1976).

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Saint-Dizier, J. P.

Sinha, S.

S. Sinha and J. N. Bardsley, "Symmetric charge transfer in low-energy ion-atom collisions," Phys. Rev. A 14, 104–113 (1976).

Steinhaus, D. W.

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Vergès, J.

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

Willett, C. S.

C. S. Willett, Introduction to Gas Lasers: Population Inversion Mechanism (Pergamon, New York, 1974).

Zalewski, E. F.

Appl. Opt. (3)

IEEE J. Quantum Electron. (2)

C. Demuynck and J. L. Destombes, "Optogalvanic spectrum of molecular iodine," IEEE J. Quantum Electron. QE-17, 575–577 (1981).

D. M. Pepper, "Analysis of the optogalvanic effect in discharge plasmas using rate equations in a modified Schottky formalism," IEEE J. Quantum Electron. QE-14, 971–977 (1978).

J. Opt. Soc. Am. (3)

J. Phys. (2)

P. Camus, M. Dieulin, and C. Morillon, "Optogalvanic detection of barium high-lying levels with a two-step pulsed laser excitation," J. Phys. (Paris) 40, L513–L517 (1979).

S. Gerstenkorn, P. Luc, Cl. Bauche-Arnoult, and D. Merle, "Structure hyperfine du niveau fondamental, moments dipolaire et quadrupolaire de l'isotope 235 de l'uranium," J. Phys. (Paris) 34, 805–812 (1973).

Phys. Rev. A (1)

S. Sinha and J. N. Bardsley, "Symmetric charge transfer in low-energy ion-atom collisions," Phys. Rev. A 14, 104–113 (1976).

Other (3)

D. W. Steinhaus, L. J. Radziemski, Jr., R. D. Cowan, J. Blaise, G. Guelachvili, Z. Ben Osman, and J. Vergès, "Present status of the analyses of the first and second spectra of uranium (U I, and U II) as derived from measurements of optical spectra," LA-4501, UC-34 (Los Alamos National Laboratory, Los Alamos, N.M., 1971).

C. S. Willett, Introduction to Gas Lasers: Population Inversion Mechanism (Pergamon, New York, 1974).

Y. Demers, Master's Degree thesis (Ecole Polytechnique, Montréal, 1980).

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