Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/97362
Title: Note on electron impact excitation for transition 2s2 1S0-2s2p 3P1 of Be-like isoelectronic sequence
Authors: Guo-Xin, C. 
Ong, P.P. 
Issue Date: May-1999
Source: Guo-Xin, C.,Ong, P.P. (1999-05). Note on electron impact excitation for transition 2s2 1S0-2s2p 3P1 of Be-like isoelectronic sequence. European Physical Journal D 6 (2) : 153-156. ScholarBank@NUS Repository.
Abstract: Relativistic distorted-wave method was used to calculate the electron impact excitation collision strengths for transitions 2s2 1S0-2s2p 3P1 of Be-like isoe'ectronic ions. The target states were described, respectively, by 10-level, 46-level and 133-level MCDF configuration-expansion. The relativistic continuum orbitals were calculated in the potential field of frozen target-ion charge distribution with semi-classical exchange potential. The influence of the target states on this collision process along the isoelectronic sequence was investigated in the above three MCDF configuration-expansion modes. It was found that the configurations in the n = 3 and the n = 4 complexes have great influence on both the high and the low Z ions but the influence is relatively small for intermediate Z ions. The latter phenomenon was attributed to competition between opposing correlation and relativistic effects on the collision strengths.
Source Title: European Physical Journal D
URI: http://scholarbank.nus.edu.sg/handle/10635/97362
ISSN: 14346060
Appears in Collections:Staff Publications

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