Effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions
Effect of an external magnetic field on the determination of E1M1 two-photon decay rates in Be-like ions
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外部磁场对 Be 类离子 E1M1 双光子衰变率测定的影响
DOI:
10.1103/physreva.88.022513
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发表时间:
2013-07
影响因子:
2.9
通讯作者:
Zou Yaming
中科院分区:
文献类型:
--
作者:
Grumer, Jon;Li Wenxian;Bernhardt Dietrich;Li Jiguang;Schippers Stefan;Brage Tomas;Jonsson Per;Hutton Roger;Zou Yaming
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. (Less)
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DOI:
10.1088/0953-4075/43/7/074034
发表时间:
2009-06
期刊:
Journal of Physics B
影响因子:
--
作者:
E. Trabert
通讯作者:
E. Trabert
DOI:
10.5860/choice.26-6270
发表时间:
1989
期刊:
--
影响因子:
--
作者:
D. Osterbrock;G. Ferland
通讯作者:
D. Osterbrock;G. Ferland
DOI:
10.1016/0370-1573(90)90040-9
发表时间:
1990-11
期刊:
Physics Reports
影响因子:
--
作者:
H. Poth
通讯作者:
H. Poth
影响因子:
8.6
作者:
HT Schmidt;P. Forck;M. Grieser;D. Habs;J. Kenntner;G. Miersch;R. Repnow;Ulrich Schramm;T. Schüßler;D. Schwalm;Andreas Wolf
通讯作者:
HT Schmidt;P. Forck;M. Grieser;D. Habs;J. Kenntner;G. Miersch;R. Repnow;Ulrich Schramm;T. Schüßler;D. Schwalm;Andreas Wolf
DOI:
10.1086/145480
发表时间:
1951-11
期刊:
The Astrophysical Journal
影响因子:
--
作者:
L. Spitzer;J. Greenstein
通讯作者:
L. Spitzer;J. Greenstein