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|Title:||Note on electron impact excitation for transition 2s2 1S0-2s2p 3P1 of Be-like isoelectronic sequence|
|Authors:||Guo-Xin, C. |
|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|
|Appears in Collections:||Staff Publications|
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