EGAS41 - Swansea University

41 st EGAS CP 22 Gdańsk 2009
Two-electron-one-photon M1 and E2 transition between 2p 3 and
2s 2 2p configuration of B-like ions
J.G. Li 1,2 , C.Z. Dong 1,2,∗ , P. Jönsson 3 , G. Gaigalas 4,5
1 College of Physics and Electronic Engineering, Northwest Normal University,
Lanzhou 730070, China
2 Joint Laboratory of Atomic Physics, NWNU & IMP CAS, Lanzhou 730070, China
3 Nature, Environment, Society, Malmö University, Malmö S-20506, Sweden
4 Department of Physics, Vilnius Pedagogical University, Studentu 39,
Vilnius LT-08106, Lithuania
5 Institute of Theoretical Physics and Astronomy, A. Goštauto 12, Vilnius LT-01108, Lithuania
∗ Corresponding author: Dongcz@nwnu.edu.cn
In the past years, there are many studies on energy structures, transition probabilities
and relevant atomic properties of B-like ions. On the one hand, there exist strong configuration
interactions between the 2s2p 2 configuration and the 2s 2 ns and 2s 2 nd Rydberg
series. It is interesting to explore electron correlation, Breit interactions and quantum
electrodynamical (QED) effects in the B-like ions [1,2]. On the other hand, B-like ions
widely exist astrophysical [3] and laboratory plasma like EBIT or thermal nuclear fusion
device [2,4]. Therefore, the transitions within the n = 2 complex including forbidden
and resonance lines play key roles in diagnose of temperature, density and abundance of
plasma [5].
More recently, a large scale spectrum calculations on energy levels, specific mass shift
parameters, hyperfine interaction constants, Landé g J factors and transition probabilities
for C II, N III and O IV have been carried out by us [6] using GRASP2K package [7]
based on multiconfiguration Dirac-Fock method. In this paper, we further calculated towelectron-one-photon
(TEOP) M1 and E2 transitions between 2p 3 and 2s 2 2p configuration
of B-like ions with 18 ≤ Z ≤ 74 [8]. The influence of Breit interaction and QED effect
on concerned TEOP M1 and E2 transitions energies and probabilities were analyzed in
detail. It was found that the contributions of Breit interaction to the TEOP transition
can not be neglected especially for M1 decay.
References
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[3] G.D. Sandlin, et al., Astron. Astrophys. Suppl. 61 801 (1986)
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[5] B. Edlén, Phys. Scr. 28 483 1983
[6] P. Jönsson, J.G. Li, G. Gaigalas, C.Z. Dong, Atomic Data Nuclear Data Table (in
print) (2009)
[7] P. Jönsson, X. He, Ch. Froese Fischer, I.P. Grant, Comput. Phys. Commun. 177
(2007) 597
[8] J.G. Li, C.Z. Dong, P. Jönsson, G. Gaigalas, Phys. Src. (to be submitted) (2009)
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