Photoionization of Cl+ from the 3s23p4 3P2,1,0 and the 3s23p4 1D2,1S0 states in the energy range 19–28 eV

McLaughlin, Brendan M.

doi:10.1093/mnras/stw2520

Title: Photoionization of Cl⁺ from the 3s²3p^{4 3}P_2,1,0 and the 3s²3p^{4 1}D₂,¹S₀ states in the energy range 19–28 eV

Journal Article · Mon Oct 31 00:00:00 EDT 2016 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/stw2520· OSTI ID:1523814

McLaughlin, Brendan M. ^[1]

Queen's Univ., Belfast, Northern Ireland (United Kingdom). Center for Theoretical Atomic Molecular and Optical Physics (CTAMOP). School of Mathematics and Physics; Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States). Inst. for Theoretical Atomic Molecular and Optical Physics (ITAMP)

Absolute photoionization cross-sections for the Cl⁺ ion in its ground and the metastable states, 3s²3p^{4 3}P_2,1,0 and 3s²3p^{4 1}D₂,¹S₀, were measured recently at the Advanced Light Source at Lawrence Berkeley National Laboratory using the merged beams photon–ion technique at a photon energy resolution of 15 meV in the energy range 19–28 eV. These measurements are compared here with large-scale Dirac–Coulomb R-matrix calculations in the same energy range. Photoionization of this sulphur-like chlorine ion is characterized by multiple Rydberg series of auto-ionizing resonances superimposed on a direct photoionization continuum. A wealth of resonance features observed in the experimental spectra is spectroscopically assigned, and their resonance parameters are tabulated and compared with the recent measurements. Metastable fractions in the parent ion beam are determined from this study. Theoretical resonance energies and quantum defects of the prominent Rydberg series 3s²3p³nd, identified in the spectra as 3p → nd transitions, are compared with the available measurements made on this element. Weaker Rydberg series 3s²3p³ns, identified as 3p → ns transitions and window resonances 3s3p⁴(⁴P)np features, due to 3s → np transitions, are also found in the spectra.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF); Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231; AC05-00OR22725

OSTI ID:: 1523814

Journal Information:: Monthly Notices of the Royal Astronomical Society, Vol. 464, Issue 2; ISSN 0035-8711

Publisher:: Royal Astronomical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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