The Spectrum of Singly Ionized Boron B II

Abstract

The spectrum of singly ionized boron has been studied by using a sliding spark in vacuum. The wavelength list contains 76 lines in the region 9 660-630 Å, 33 of which have not been observed or identified before. The singlets and triplets have been connected by the assumption that 6g 1 G and 6g 3 G have the same term value. The ionization energy has been determined to 202 887.4 ± 1.0 cm-1 by means of the polarization formula for 5g and 6g with a theoretical value of the dipole polarizability. The application of the polarization formula to other members of the Be isoelectronic sequence has lead to an increase by 27.2 cm-1 in the ionization limit of C III. The new value is 386 241.0 ± 1.0 cm-1.

Allowed transitions and intercombination lines in B II

“…The length form of the line strength, S~, is relatively unchanged with similar extrapolated limits. As a test of the model, results are also reported for a calculation n = 7*, where the common CAS is [17]. The uncertainties were determined from the quoted uncertainty of the measured wavelengths extended from n = 3 to n = 4.…”

“…In the valence correlation only model the calculation exhibits a rapid convergence. The transition [17]. The uncertainties were determined from the quoted uncertainty of the measured wavelengths [22] b ()lme [17].…”

“…The transition [17]. The uncertainties were determined from the quoted uncertainty of the measured wavelengths [22] b ()lme [17]. The uncertainties were determined from the quoted uncertainty of the measured wavelengths energy is converging to a value approximately 200 c m -t away from the experimental value.…”

“…Even though the individual eigenfunctions may be well represented the fine structure splitting can be affected by the restrictions imposed by the calculational model employed. In the core-valence calculation in this paper the fine structure is not well [17]. The uncertainties were determined from wavelengths the quoted uncertainty of the measured represented.…”

Absorption Spectra of Light Ions in the Extreme Ultraviolet

“…2 shows the absorption spectrum of B in the region 450-1380 A, recorded at 1.5 mm distance from the target. All of the main transitions in the normal spectrum and several of the displaced one are present with several newly observed lines (Olme, 1970). Clearly visible are the jumps corresponding to the photoionization of a p(2p + Ed) and s(2s->-ep) elec-O tron.…”