Abstract

Mean lives of eight terms in B iv and three in B v have been measured using the techniques of beam-foil spectroscopy. The terms in B iv and the measured mean lives are (in picoseconds): 1s2p 1P0, <5; 1s4d 1D, 117 ± 16; 1s3d 1D, 63 ± 3; 1s3s 1S, 393 ± 4; 1s4d 3D, 131 ± 8; 1s3p 3P0, 222 ± 4; 1s3d 3D, 59 ± 3; 1s3s3S, 474 ± 28. These results and those for B v are compared with theory and previous experimental results.

© 1978 Optical Society of America

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References

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  1. J. P. Buchet and M. C. Buchet-Poulizac, “Beam-foil study of boron in the far ultraviolet,” J. Opt. Soc. Am. 63, 243–244 (1973).
    [Crossref]
  2. P. R. Bevington, Data Reduction and Error Analysis for the Physical Sciences (McGraw-Hill, New York, 1969).
  3. J. P. Buchet, “Etude, au moyen de faisceaux d’ions accélérés, des éléments légers (Z≤ 10) fortement ionisés: spectres dans l’UV lointain, durées de vie radiatives et fories d’oscillateur,” thèse (L’Universite Claude Bernard, Lyon, France, 1976) (unpublished).
  4. J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
    [Crossref]
  5. L. J. Curtis, H. G. Berry, and J. Bromander, “Analysis of multi-exponential decay curves,’ Phys. Scr. 2, 216–220 (1970).
    [Crossref]
  6. K. X. To, E. J. Knystautas, R. Drouin, and H. G. Berry, “Doubly-excited states in B iii,” in Beam Foil Spectroscopy, edited by I. A. Sellin and D. J. Pegg (Plenum, New York, 1976), pp. 385–391.
    [Crossref]
  7. K. X. To, E. J. Knystautas, and R. Drouin, “Spectroscopy of B iv in Far Ultraviolet,” Can. J. Spectrosc. 19, 72–75 (1974).
  8. M. Eidelsberg, “The spectrum and term system of helium-like boron, B iv,” J. Phys. B 7, 1476–1485 (1974).
    [Crossref]
  9. M. Cohen and R. P. McEachran, “Systematic trends in atomic oscillator strengths: the helium isoelectric sequence,” Can. J. Phys. 50, 1363–1369 (1972).
    [Crossref]
  10. W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic transition probabilities, hydrogen through neon, Natl. Bur. Stand. Monograph No. NBS4 (U.S. GPO, Washington, D.C., 1966).
  11. E. H. Pinnington, A. E. Livingston, and J. A. Kernahan, “Comment on the reliability of experimental atomic mean lives obtained with the beam-foil technique,” Phys. Rev. A 9, 1004–1006 (1974).
    [Crossref]

1975 (1)

J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
[Crossref]

1974 (3)

K. X. To, E. J. Knystautas, and R. Drouin, “Spectroscopy of B iv in Far Ultraviolet,” Can. J. Spectrosc. 19, 72–75 (1974).

M. Eidelsberg, “The spectrum and term system of helium-like boron, B iv,” J. Phys. B 7, 1476–1485 (1974).
[Crossref]

E. H. Pinnington, A. E. Livingston, and J. A. Kernahan, “Comment on the reliability of experimental atomic mean lives obtained with the beam-foil technique,” Phys. Rev. A 9, 1004–1006 (1974).
[Crossref]

1973 (1)

1972 (1)

M. Cohen and R. P. McEachran, “Systematic trends in atomic oscillator strengths: the helium isoelectric sequence,” Can. J. Phys. 50, 1363–1369 (1972).
[Crossref]

1970 (1)

L. J. Curtis, H. G. Berry, and J. Bromander, “Analysis of multi-exponential decay curves,’ Phys. Scr. 2, 216–220 (1970).
[Crossref]

Berry, H. G.

L. J. Curtis, H. G. Berry, and J. Bromander, “Analysis of multi-exponential decay curves,’ Phys. Scr. 2, 216–220 (1970).
[Crossref]

K. X. To, E. J. Knystautas, R. Drouin, and H. G. Berry, “Doubly-excited states in B iii,” in Beam Foil Spectroscopy, edited by I. A. Sellin and D. J. Pegg (Plenum, New York, 1976), pp. 385–391.
[Crossref]

Bevington, P. R.

P. R. Bevington, Data Reduction and Error Analysis for the Physical Sciences (McGraw-Hill, New York, 1969).

Bromander, J.

L. J. Curtis, H. G. Berry, and J. Bromander, “Analysis of multi-exponential decay curves,’ Phys. Scr. 2, 216–220 (1970).
[Crossref]

Buchet, J. P.

J. P. Buchet and M. C. Buchet-Poulizac, “Beam-foil study of boron in the far ultraviolet,” J. Opt. Soc. Am. 63, 243–244 (1973).
[Crossref]

J. P. Buchet, “Etude, au moyen de faisceaux d’ions accélérés, des éléments légers (Z≤ 10) fortement ionisés: spectres dans l’UV lointain, durées de vie radiatives et fories d’oscillateur,” thèse (L’Universite Claude Bernard, Lyon, France, 1976) (unpublished).

Buchet-Poulizac, M. C.

Cohen, M.

M. Cohen and R. P. McEachran, “Systematic trends in atomic oscillator strengths: the helium isoelectric sequence,” Can. J. Phys. 50, 1363–1369 (1972).
[Crossref]

Curtis, L. J.

L. J. Curtis, H. G. Berry, and J. Bromander, “Analysis of multi-exponential decay curves,’ Phys. Scr. 2, 216–220 (1970).
[Crossref]

Drouin, R.

K. X. To, E. J. Knystautas, and R. Drouin, “Spectroscopy of B iv in Far Ultraviolet,” Can. J. Spectrosc. 19, 72–75 (1974).

K. X. To, E. J. Knystautas, R. Drouin, and H. G. Berry, “Doubly-excited states in B iii,” in Beam Foil Spectroscopy, edited by I. A. Sellin and D. J. Pegg (Plenum, New York, 1976), pp. 385–391.
[Crossref]

Eidelsberg, M.

M. Eidelsberg, “The spectrum and term system of helium-like boron, B iv,” J. Phys. B 7, 1476–1485 (1974).
[Crossref]

Glennon, B. M.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic transition probabilities, hydrogen through neon, Natl. Bur. Stand. Monograph No. NBS4 (U.S. GPO, Washington, D.C., 1966).

Irwin, D. J. G.

J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
[Crossref]

Kernahan, J. A.

J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
[Crossref]

E. H. Pinnington, A. E. Livingston, and J. A. Kernahan, “Comment on the reliability of experimental atomic mean lives obtained with the beam-foil technique,” Phys. Rev. A 9, 1004–1006 (1974).
[Crossref]

Knystautas, E. J.

K. X. To, E. J. Knystautas, and R. Drouin, “Spectroscopy of B iv in Far Ultraviolet,” Can. J. Spectrosc. 19, 72–75 (1974).

K. X. To, E. J. Knystautas, R. Drouin, and H. G. Berry, “Doubly-excited states in B iii,” in Beam Foil Spectroscopy, edited by I. A. Sellin and D. J. Pegg (Plenum, New York, 1976), pp. 385–391.
[Crossref]

Livingston, A. E.

J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
[Crossref]

E. H. Pinnington, A. E. Livingston, and J. A. Kernahan, “Comment on the reliability of experimental atomic mean lives obtained with the beam-foil technique,” Phys. Rev. A 9, 1004–1006 (1974).
[Crossref]

McEachran, R. P.

M. Cohen and R. P. McEachran, “Systematic trends in atomic oscillator strengths: the helium isoelectric sequence,” Can. J. Phys. 50, 1363–1369 (1972).
[Crossref]

Pinnington, E. H.

J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
[Crossref]

E. H. Pinnington, A. E. Livingston, and J. A. Kernahan, “Comment on the reliability of experimental atomic mean lives obtained with the beam-foil technique,” Phys. Rev. A 9, 1004–1006 (1974).
[Crossref]

Smith, M. W.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic transition probabilities, hydrogen through neon, Natl. Bur. Stand. Monograph No. NBS4 (U.S. GPO, Washington, D.C., 1966).

To, K. X.

K. X. To, E. J. Knystautas, and R. Drouin, “Spectroscopy of B iv in Far Ultraviolet,” Can. J. Spectrosc. 19, 72–75 (1974).

K. X. To, E. J. Knystautas, R. Drouin, and H. G. Berry, “Doubly-excited states in B iii,” in Beam Foil Spectroscopy, edited by I. A. Sellin and D. J. Pegg (Plenum, New York, 1976), pp. 385–391.
[Crossref]

Wiese, W. L.

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic transition probabilities, hydrogen through neon, Natl. Bur. Stand. Monograph No. NBS4 (U.S. GPO, Washington, D.C., 1966).

Can. J. Phys. (1)

M. Cohen and R. P. McEachran, “Systematic trends in atomic oscillator strengths: the helium isoelectric sequence,” Can. J. Phys. 50, 1363–1369 (1972).
[Crossref]

Can. J. Spectrosc. (1)

K. X. To, E. J. Knystautas, and R. Drouin, “Spectroscopy of B iv in Far Ultraviolet,” Can. J. Spectrosc. 19, 72–75 (1974).

J. Opt. Soc. Am. (1)

J. Phys. B (1)

M. Eidelsberg, “The spectrum and term system of helium-like boron, B iv,” J. Phys. B 7, 1476–1485 (1974).
[Crossref]

Phys. Rev. A (1)

E. H. Pinnington, A. E. Livingston, and J. A. Kernahan, “Comment on the reliability of experimental atomic mean lives obtained with the beam-foil technique,” Phys. Rev. A 9, 1004–1006 (1974).
[Crossref]

Phys. Scr. (2)

J. A. Kernahan, E. H. Pinnington, A. E. Livingston, and D. J. G. Irwin, “Mean-life measurements for levels in B i–B iv,” Phys. Scr. 12, 319–322 (1975).
[Crossref]

L. J. Curtis, H. G. Berry, and J. Bromander, “Analysis of multi-exponential decay curves,’ Phys. Scr. 2, 216–220 (1970).
[Crossref]

Other (4)

K. X. To, E. J. Knystautas, R. Drouin, and H. G. Berry, “Doubly-excited states in B iii,” in Beam Foil Spectroscopy, edited by I. A. Sellin and D. J. Pegg (Plenum, New York, 1976), pp. 385–391.
[Crossref]

P. R. Bevington, Data Reduction and Error Analysis for the Physical Sciences (McGraw-Hill, New York, 1969).

J. P. Buchet, “Etude, au moyen de faisceaux d’ions accélérés, des éléments légers (Z≤ 10) fortement ionisés: spectres dans l’UV lointain, durées de vie radiatives et fories d’oscillateur,” thèse (L’Universite Claude Bernard, Lyon, France, 1976) (unpublished).

W. L. Wiese, M. W. Smith, and B. M. Glennon, Atomic transition probabilities, hydrogen through neon, Natl. Bur. Stand. Monograph No. NBS4 (U.S. GPO, Washington, D.C., 1966).

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Figures (3)

FIG. 1
FIG. 1

Partial spectrum of B taken with an incident ion energy of 5 MeV. The charge collected per channel and the beam intensity are indicated. The quotation marks indicate second-order lines. Wavelengths are given in Å.

FIG. 2
FIG. 2

Partial spectrum of B taken with an incident ion energy of 3 MeV. Wavelengths are given in Å.

FIG. 3
FIG. 3

Decay curve of the 344 Å transition in B iv taken at an incident ion energy of 3 MeV. The lines are from a computer fit to the data.

Tables (1)

Tables Icon

TABLE I Measured mean lives.