Journal article

Publication year: 2019

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Volume number: 52

Issue number: 19

ISSN: 0953-4075

eISSN: 1361-6455

Open access status: Hybrid

DOI Link: https://doi.org/10.1088/1361-6455/ab39c8

Publisher: IOP Publishing

Abstract: 
Experimental and theoretical cross sections are reported for single-photon single ionization of W5+ ions. Absolute measurements were conducted employing the photon-ion merged-beams technique. Detailed photon-energy scans were performed at (67 +/- 10). meV resolution in the 20-160 eV range. In contrast to photoionization of tungsten ions in lower charge states, the cross section is dominated by narrow, densely-spaced resonances. Theoretical results were obtained from a Dirac-Coulomb R-matrix approach employing a basis set of 457 levels providing cross sections for photoionization of W5+ ions in the 4f(14)5s(2)5p(6)5d D-2(3/2) ground level as well as the 4f(14)5s(2)5p(6)5d D-2(5/2) and 4f(14)5s(2) 5p(6)6s S-2(1/2) metastable excited levels. Considering the complexity of the electronic structure of tungsten ions in low charge states, the agreement between theory and experiment is satisfactory.

Harvard Citation style: Müller, A., Schippers, S., Hellhund, J., Kilcoyne, A., Phaneuf, R. and McLaughlin, B. (2019) Photoionization of tungsten ions: experiment and theory for W5+, Journal of Physics B: Atomic, Molecular and Optical Physics, 52(19), Article 195005. https://doi.org/10.1088/1361-6455/ab39c8

APA Citation style: Müller, A., Schippers, S., Hellhund, J., Kilcoyne, A., Phaneuf, R., & McLaughlin, B. (2019). Photoionization of tungsten ions: experiment and theory for W5+. Journal of Physics B: Atomic, Molecular and Optical Physics. 52(19), Article 195005. https://doi.org/10.1088/1361-6455/ab39c8