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Title: Photoionization of Rb 2+ ions in the valence energy region 37–44 eV

Abstract

Absolute photoionization cross sections for the Rb2+ ion were recently measured at high resolution over the energy range 37.31–44.08 eV, with autoionizing Rydberg resonance series identified, using the photon-ion merged-beam setup at the Advanced Light Source (als) in Berkeley (Macaluso D A et al 2016 J. Phys. B: At. Mol. Opt. Phys. 49, 235002; 2017 50, 119501). Detailed photon-energy scans taken at 13.5 ± 2.5 meV bandwidth illustrated multiple Rydberg resonance series associated with the ground and metastable states. Here we present theoretical cross section results obtained using the Dirac–Coulomb R-matrix approximation with a detailed analysis of the resonances. The calculations were performed for the $$3{d}^{10}4{s}^{2}4{p}^{5}{}^{2}{{{\rm{P}}}^{{\rm{o}}}}_{J}$$, $$J=\tfrac{3}{2}$$ ground state and the corresponding $$3{d}^{10}4{s}^{2}4{p}^{5}{}^{2}{{{\rm{P}}}^{{\rm{o}}}}_{J},J=\tfrac{1}{2}$$ metastable level. Finally, results from the large-scale calculations are benchmarked against the als high-resolution measurements and reproduce the dominant resonance features in the spectra, providing confidence in the theoretical work for astrophysical applications.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Queen's Univ., Belfast, Northern Ireland (United Kingdom); Harvard & Smithsonian, Cambridge, MA (United States)
  2. Harvard & Smithsonian, Cambridge, MA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1526968
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physics. B, Atomic, Molecular and Optical Physics
Additional Journal Information:
Journal Volume: 52; Journal Issue: 12; Journal ID: ISSN 0953-4075
Publisher:
IOP Publishing
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS

Citation Formats

McLaughlin, Brendan M., and Babb, James F. Photoionization of Rb2+ ions in the valence energy region 37–44 eV. United States: N. p., 2019. Web. doi:10.1088/1361-6455/ab1e99.
McLaughlin, Brendan M., & Babb, James F. Photoionization of Rb2+ ions in the valence energy region 37–44 eV. United States. doi:10.1088/1361-6455/ab1e99.
McLaughlin, Brendan M., and Babb, James F. Tue . "Photoionization of Rb2+ ions in the valence energy region 37–44 eV". United States. doi:10.1088/1361-6455/ab1e99.
@article{osti_1526968,
title = {Photoionization of Rb2+ ions in the valence energy region 37–44 eV},
author = {McLaughlin, Brendan M. and Babb, James F.},
abstractNote = {Absolute photoionization cross sections for the Rb2+ ion were recently measured at high resolution over the energy range 37.31–44.08 eV, with autoionizing Rydberg resonance series identified, using the photon-ion merged-beam setup at the Advanced Light Source (als) in Berkeley (Macaluso D A et al 2016 J. Phys. B: At. Mol. Opt. Phys. 49, 235002; 2017 50, 119501). Detailed photon-energy scans taken at 13.5 ± 2.5 meV bandwidth illustrated multiple Rydberg resonance series associated with the ground and metastable states. Here we present theoretical cross section results obtained using the Dirac–Coulomb R-matrix approximation with a detailed analysis of the resonances. The calculations were performed for the $3{d}^{10}4{s}^{2}4{p}^{5}{}^{2}{{{\rm{P}}}^{{\rm{o}}}}_{J}$, $J=\tfrac{3}{2}$ ground state and the corresponding $3{d}^{10}4{s}^{2}4{p}^{5}{}^{2}{{{\rm{P}}}^{{\rm{o}}}}_{J},J=\tfrac{1}{2}$ metastable level. Finally, results from the large-scale calculations are benchmarked against the als high-resolution measurements and reproduce the dominant resonance features in the spectra, providing confidence in the theoretical work for astrophysical applications.},
doi = {10.1088/1361-6455/ab1e99},
journal = {Journal of Physics. B, Atomic, Molecular and Optical Physics},
number = 12,
volume = 52,
place = {United States},
year = {2019},
month = {5}
}

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