EFFECT OF POSITIVE-ENERGY ORBITALS ON THE PHOTOIONIZATION CROSS-SECTIONS AND OSCILLATOR-STRENGTHS OF HE AND DIVALENT ATOMS

被引:45
作者
CHANG, TN
FANG, TK
机构
[1] Department of Physics and Astronomy, University of Southern California, Los Angeles
来源
PHYSICAL REVIEW A | 1995年 / 52卷 / 04期
关键词
D O I
10.1103/PhysRevA.52.2638
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
The effect of the positive-energy continuum orbitals to the photoionization and bound-bound transitions in He and Mg-like divalent Al+ ion is estimated quantitatively in a B-spline-based configuration-interaction calculation. Our calculation has also shown that the theoretical uncertainty in radiative lifetimes measured in terms of the difference between the length and velocity results, due to the use of a parametrized long-range dipole core-polarization potential, is approximately 1-3 % for the Mg-like divalent Al+ ion.
引用
收藏
页码:2638 / 2644
页数:7
相关论文
共 20 条
[1]  
BARTSCHAT K, 1993, J PHYS B-AT MOL OPT, V26, pL109
[2]  
Chang T., 1993, MANY BODY THEORY ATO, P213
[3]  
Chang T. N., 1989, Chinese Journal of Physics, V27, P425
[4]   RADIATIVE LIFETIMES OF THE BOUND EXCITED-STATES OF MAGNESIUM AND BERYLLIUM [J].
CHANG, TN .
PHYSICAL REVIEW A, 1990, 41 (09) :4922-4929
[5]   NONUNIFORM VARIATION OF THE RADIATIVE LIFETIMES OF BOUND EXCITED-STATES ALONG THE MG ISOELECTRONIC SEQUENCE [J].
CHANG, TN ;
WANG, RQ .
PHYSICAL REVIEW A, 1991, 44 (01) :80-89
[6]   EFFECT OF POSITIVE-ENERGY ORBITALS ON THE CONFIGURATION-INTERACTION CALCULATION OF THE H- ATOM [J].
CHANG, TN ;
WANG, RQ .
PHYSICAL REVIEW A, 1991, 43 (03) :1218-1222
[7]   PHOTOIONIZATION OF 2-ELECTRON ATOMS USING A NONVARIATIONAL CONFIGURATION-INTERACTION APPROACH WITH DISCRETIZED FINITE BASIS [J].
CHANG, TN ;
TANG, X .
PHYSICAL REVIEW A, 1991, 44 (01) :232-238
[8]   EFFECT OF THE CONFIGURATION-INTERACTION ON THE THEORETICAL OSCILLATOR-STRENGTHS OF THE MAGNESIUM ATOM [J].
CHANG, TN .
PHYSICAL REVIEW A, 1987, 36 (02) :447-455
[9]   F VALUES FOR HIGH-LYING S-P, AND P-D TRANSITIONS IN THE HE ATOM BY SELECTED B-SPLINE BASIS FUNCTIONS [J].
CHEN, MK .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1994, 27 (20) :4847-4865
[10]   ACCURATE OSCILLATOR-STRENGTHS FOR S-P TRANSITIONS IN THE HE ATOM [J].
CHEN, MK .
JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1994, 27 (05) :865-876