Abstract
The spectrum of quadruply ionized bismuth (Bi V) has been investigated in the vacuum ultraviolet region 190–1900 Å. Several bismuth spectrograms were recorded on a 3-m Normal Incidence Spectrograph at the Antigonish laboratory in Canada using a triggered spark light source. The theoretical interpretation for this ion has been carried out by means of pseudo-relativistic Hartree–Fock approach implemented in the Cowan program. The previous results on the energy level structure of Bi V have been confirmed with the identification of five new energy levels of the partially studied configuration 5d96s6p. Fifteen energy levels affiliated to two new even parity configurations 5d96p2 and 5d96s6d were also established for the first time. The present analysis led to the determination of 66 energy levels in the 5d10nℓ (n = 6–11; ℓ = 0–2), 5d96s2, 5d96snp (n = 6–8), 5d96snf (n = 5–7), 5d96p2, and 5d96s6d configurations were optimized using the LOPT program. About 127 spectral lines identified in the Bi V spectrum are reported with their Ritz wavelengths and measurement uncertainties. The energy parameters were determined by least-squares fitting to the observed levels. Calculated transition probability values as well as LS and jj compositions obtained from fitted parameters are presented. A thorough comparison of the transition rates with previous theoretical and experimental results has been performed and the close agreement is observed. The ionization limit of Bi V is determined to be 451,313 cm−1.
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This manuscript has associated data in a data repository. [Authors’ comment: The associated data is documented in this article.]
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01 September 2023
A Correction to this paper has been published: https://doi.org/10.1140/epjd/s10053-023-00747-w
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Acknowledgements
Neelam Kumari Arya would like to acknowledge the financial assistance from the University Grants Commission (U.G.C.) Delhi, India. We are thankful to Department of Physics, Aligarh Muslim University (A.M.U.) Aligarh, for providing seamless access to the research facilities. A. Tauheed would like to thank the local hospitality of St. Francis Xavier University, Antigonish (Canada) during the recording of bismuth spectra. The authors are extremely grateful to Dr. Alexander Kramida of NIST for valuable discussions regarding the hyperfine structure patterns of bismuth ions. NK Arya would like to thank Dr. Ankita Saxena for her constructive comments and suggestions.
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NKA: Conceptualization, Analysis and Investigation, Writing—original draft. AT: Conceptualization, Investigation, Supervision, Writing—review and editing.
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Arya, N.K., Tauheed, A. The spectroscopic and transition properties of quadruply ionized bismuth: Bi V. Eur. Phys. J. D 77, 150 (2023). https://doi.org/10.1140/epjd/s10053-023-00720-7
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DOI: https://doi.org/10.1140/epjd/s10053-023-00720-7