Abstract

Beam-foil excitation of the bromine spectrum has been applied to the measurement of radiative lifetimes for eight terms in Br v to Br vii, using HBr⁺ ions of energy 0.5–1.6 MeV. The multiplet f values derived from these results are found to be reasonably consistent with other measurements for the analogous transitions in homologous atoms, except for the 4s4p^{2 2}D term in Br v, where configuration interaction is known to be important. Agreement within a factor of two is found with f values forecast by calculations based upon the Coulomb approximation. The behavior of the f values of the 4s^{2 1}S–4s4p ¹P⁰ and 4s4p ³P⁰–4s4d ³D transitions along the Zn i isoelectronic sequence is considered in detail, and again the experimental results are consistent with each other but differ from f values calculated by several techniques by a factor of about two. Many previously unclassified lines have been observed, and tentative assignments are suggested for five of these. Decay curves have also been recorded for nine spectral features in the region 550–650 Å, which suggest that the ¹P⁰, ¹D⁰, ³P⁰, and ³D⁰ terms of the 4p4d configuration in Br iv all have lifetimes in the range 0.08–0.14 ns.

© 1977 Optical Society of America

Spectroscopic studies of Si v and Si vI between 500 and 1300 Å using the beam-foil method*

H. P. Garnir, E. Biémont, N. Grevesse, A. E. Livingston, Y. Baudinet-Robinet, and P. D. Dumont
J. Opt. Soc. Am. 67(6) 751-754 (1977)

Study of the beam-foil spectrum of Xe vi, and Xe vii, and Xe viii from 500 to 1550 Å

J. A. Kernahan, E. H. Pinnington, J. A. O’Neill, J. L. Bahr, and K. E. Donnelly
J. Opt. Soc. Am. 70(9) 1126-1130 (1980)

Beam-Foil Spectra of Boron 450–5000 Å*

Indrek Martinson, William S. Bickel, and Alf Ölme
J. Opt. Soc. Am. 60(9) 1213-1220 (1970)

Beam-foil study of krypton between 400 and 800 Å

M. Druetta and J. P. Buchet
J. Opt. Soc. Am. 66(5) 433-436 (1976)

Beam–foil spectroscopy of neon between 80 and 350 Å

J. P. Buchet and M. Druetta
J. Opt. Soc. Am. 65(9) 991-994 (1975)