The effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions

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The effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions

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Publication Article, peer reviewed scientific
Title The effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions
Author Grumer, Jon ; Li, Wenxian ; Bernhardt, Dietrich ; Jiguang, Li ; Schippers, Stefan ; Brage, Tomas ; Jönsson, Per ; Hutton, Roger ; Zho, Yaming
Date 2013
English abstract
In this work we report on ab initio theoretical results for the magnetic-field-induced 2s 2p 3P0 → 2s2 1S0 E1 transition for ions in the beryllium isoelectronic sequence between Z = 5 and 92. It has been proposed that the rate of the E1M1 two-photon transition 2s 2p 3P0 → 2s2 1S0 can be extracted from the lifetime of the 3P0 state in Be-like ions with zero nuclear spin by employing resonant recombination in a storage ring. This experimental approach involves a perturbing external magnetic field. The effect of this field needs to be evaluated in order to properly extract the two-photon rate from the measured decay curves. The magnetic-field-induced transition rates are carefully evaluated, and it is shown that, with a typical storage-ring field strength, it is dominant or of the same order as the E1M1 rate for low- and mid-Z ions. Results for several field strengths and ions are presented, and we also give a simple Z-dependent formula for the rate. We estimate the uncertainties of our model to be within 5% for low- and mid-Z ions and slightly larger for more highly charged ions. Furthermore we evaluate the importance of including both perturber states, 3P1 and 1P1, and it is s
DOI http://dx.doi.org/10.1103/PhysRevA.88.022513 (link to publisher's fulltext)
Publisher American Physical Society
Host/Issue Physical Review A;
Volume 88
ISSN 1050-2947
Pages 022513 (9 p)
Language eng (iso)
Subject Sciences
Research Subject Categories::NATURAL SCIENCES
Handle http://hdl.handle.net/2043/16476 Permalink to this page
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