Single-photon single ionization of W+ ions: experiment and theory
- 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.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; AC03-76SF-00098; FG02-76SF-03ER15424
- OSTI ID:
- 1378585
- Alternate ID(s):
- OSTI ID: 1238946
- Journal Information:
- Journal of Physics. B, Atomic, Molecular and Optical Physics, Vol. 48, Issue 23; ISSN 0953-4075
- Publisher:
- IOP PublishingCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Photoionisation of ions with synchrotron radiation: from ions in space to atoms in cages
|
journal | November 2015 |
Photoionization and photofragmentation of singly charged positive and negative endohedral fullerene ions
|
journal | June 2019 |
Photoionization and photofragmentation of singly charged positive and negative Sc$_3$N@C$_{80}$ endohedral fullerene ions
|
text | January 2019 |
Similar Records
Photoionization of tungsten ions: experiment and theory for W5+
Photoionisation of Ca+ ions in the valence-energy region 20–56 eV: experiment and theory