Single-photon single ionization of W+ ions: experiment and theory

Müller, A.; Schippers, S.; Hellhund, J.; Holste, K.; Kilcoyne, A. L. D.; Phaneuf, R. A.; Ballance, C. P.; McLaughlin, B. M.

doi:10.1088/0953-4075/48/23/235203

Title: Single-photon single ionization of W⁺ ions: experiment and theory

Journal Article · 08 October 2015 · Journal of Physics. B, Atomic, Molecular and Optical Physics

DOI: https://doi.org/10.1088/0953-4075/48/23/235203 · OSTI ID:1378585

Müller, A. ^[1]; Schippers, S. ^[1]; Hellhund, J. ^[2]; Holste, K. ^[1]; Kilcoyne, A. L. D. ^[3]; Phaneuf, R. A. ^[3]; Ballance, C. P. ^[4]; McLaughlin, B. M. ^[5]

Justus-Liebig-Univ. Giessen (Germany)
Justus-Liebig-Univ. Giessen (Germany); Univ. of Nevada, Reno, NV (United States)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Auburn Univ., AL (United States); Queen's Univ., Belfast, Northern Ireland (United Kingdom)
Harvard Smithsonian Center for Astrophysics, Cambridge, MA (United States); Queen's Univ., Belfast, Northern Ireland (United Kingdom)

Experimental and theoretical results are reported for photoionization of Ta-like (W⁺) tungsten ions. Absolute cross sections were measured in the energy range 16-245 eV employing the photon-ion merged-beam setup at the advanced light source in Berkeley. Detailed photon-energy scans at 100 meV bandwidth were performed in the 16-108 eV range. In addition, the cross section was scanned at 50 meV resolution in regions where fine resonance structures could be observed. Theoretical results were obtained from a Dirac-Coulomb R-matrix approach. Photoionization cross section calculations were performed for singly ionized atomic tungsten ions in their J = 1/2, ground level and the associated excited metastable levels with J = 3/2, 5/2, 7/2 and 9/2. Since the ion beams used in the experiments must be expected to contain long-lived excited states also from excited configurations, additional cross-section calculations were performed for the second-lowest term, J = 5/2, and for the 4 F term, with J = 3/2, 5/2, 7/2 and 9/2. Given the complexity of the electronic structure of W + the calculations reproduce the main features of the experimental cross section quite well.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)

Grant/Contract Number:: AC02-05CH11231; AC03-76SF00098

OSTI ID:: 1378585

Journal Information:: Journal of Physics. B, Atomic, Molecular and Optical Physics, Journal Name: Journal of Physics. B, Atomic, Molecular and Optical Physics Journal Issue: 23 Vol. 48; ISSN 0953-4075

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: United States

Language:: English

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Cross sections for photoionization of fullerene molecular ions C n + with n = 40, 50, 70, 76, 78, and 84 Thomas, C. M.; Baral, K. K.; Aryal, N. B. Physical Review A, Vol. 95, Issue 5 https://doi.org/10.1103/physreva.95.053412	journal	May 2017
Photoionization and photofragmentation of singly charged positive and negative Sc 3 N @ C 80 endohedral fullerene ions Müller, A.; Martins, M.; Kilcoyne, A. L. D. Physical Review A, Vol. 99, Issue 6 https://doi.org/10.1103/physreva.99.063401	journal	June 2019
Photoionization and photofragmentation of singly charged positive and negative Sc$_3$N@C$_{80}$ endohedral fullerene ions Mueller, Alfred; Martins, M.; Kilcoyne, A. L. D. Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2019-02410	text	January 2019

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