Line Identifications in the Beam-foil Spectrum of Boron

Abstract

Line identifications in the beam-foil spectrum of boron. H. G. Berry (Depart-

Additions to the Spectrum and Energy Levels and a Critical Compilation of Singly-Ionized Boron, B II

“…Berry and Subtil [10] have also found the 2s7f 3 F level, from its combination with 2s4d 3 D, at 5124 Å. Our revised wavelength is 5125.79 Å.…”

“…The 2s7s 3 S term is established from its transition to 2s2p 3 P at 645.6 Å, first found by Jannitti et al [17]. 2snp 3 P levels For this seriesÖlme [8] located the n = 2, 3, 4 and 5 terms, whereas Berry and Subtil [10] also found the 2s6p 3 P term, from its decay to 2s4s 3 S (4273 Å). We have little to contribute here, except the observation of the 2s3d 3 D -2s5p 3 P transition, at 3096.26 Å.…”

“…To these we can now add 2s6s and 2s7s 3 S. Thus, the 2s4p 3 P -2s6s 3 S combination was found at 6013.46 Å and the 2s3p 3 P -2s6s 3 S one at 2262.88 Å. Berry and Subtil [10] here suggested at line at 2265.5 Å and quoted a wavelength of 2264.68 Å (an unpublished value obtained fromÖlme). We have earlier found that the line represents the B II 2s3s 1 S -2s5p 1 P transition, blended by the 2s3p 3 P -2s6s 3 S [1].…”

“…Here the experimentally determined 2s3d, 2s4d and 2s5d 3 D levels [8] were first complemented by Berry and Subtil [10] who found 2s6d 3 D from its decay to 2s3p 3 P (2159.0 Å). Later Dumont et al [16] and Jannitti et al [17] confirmed and refined this result, and they also determined the energies of the 2snd 3 D levels up to n = 10, from their decay also to the 2s3p 3 P term.…”

“…Also, the 2s4f F -2s7g G combination, at 5265 Å, has been observed [10]. We have slightly revised this value, to 5263.12 Å, which represents the 2s4f 3 F -2s7g G transition.…”