Journal article

Publication year: 2013

Journal: Physical review A

Volume number: 88

Issue number: 2

ISSN: 1050-2947

eISSN: 1094-1622

Open access status: Green

DOI Link: https://doi.org/10.1103/PhysRevA.88.022513

Publisher: American Physical Society

Abstract: 
In this work we report on ab initio theoretical results for the magnetic-field-induced 2s 2p P-3(0) -> 2s(2) S-1(0) 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 P-3(0) -> 2s(2) S-1(0) can be extracted from the lifetime of the P-3(0) 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, P-3(1) and P-1(1), and it is shown that excluding the influence of the P-1(1) perturber overestimates the rate by up to 26% for the mid-Z ions.

Harvard Citation style: Grumer, J., Li, W., Bernhardt, D., Li, J., Schippers, S., Brage, T., et al. (2013) Effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions, Physical review A, 88(2), Article 022513. https://doi.org/10.1103/PhysRevA.88.022513

APA Citation style: Grumer, J., Li, W., Bernhardt, D., Li, J., Schippers, S., Brage, T., Jonsson, P., Hutton, R., & Zou, Y. (2013). Effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions. Physical review A. 88(2), Article 022513. https://doi.org/10.1103/PhysRevA.88.022513