USE OF THE VANREGEMORTER FORMULA FOR COLLISION STRENGTHS OR CROSS-SECTIONS

被引：37

作者：

SAMPSON, DH

ZHANG, HL

机构：

[1] Department of Astronomy and Astrophysics, Pennsylvania State University, University Park

来源：

PHYSICAL REVIEW A | 1992年 / 45卷 / 03期

关键词：

D O I：

10.1103/PhysRevA.45.1556

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The accuracy of the widely used Van Regemorter formula [Astrophys. J. 136, 906 (1962)] for calculating the collision strengths needed in applications to high-temperature plasmas is tested by comparison with numerous more accurate calculations. It is found to be frequently a very poor approximation, especially for DELTA-n greater-than-or-equal-to 1 excitation transitions from levels with l < n - 1, and the recommendation is made that with the recent advances in calculational procedures and available accurate atomic data use of the Van Regemorter formula should be discontinued.

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页码：1556 / 1561

页数：6

相关论文

共 18 条

[1] ELECTRON COLLISION EXCITATIONS IN COMPLEX SPECTRA OF IONIZED HEAVY-ATOMS [J].

BARSHALOM, A ;

KLAPISCH, M ;

OREG, J .

PHYSICAL REVIEW A, 1988, 38 (04) :1773-1784

[2] ELECTRON IMPACT EXCITATION OF POSITIVE IONS [J].

BURGESS, A ;

HUMMER, DG ;

TULLY, JA .

PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1970, 266 (1175) :225-&

[3]

BURGESS A, 1961, MEM SOC ROY SCI LIEG, V4, P299

[4] SCALED COLLISION STRENGTHS FOR DELTA-N GREATER-THAN-OR-EQUAL-TO 1 TRANSITIONS INVOLVING N LESS-THAN-OR-EQUAL-TO 5 IN HYDROGENIC IONS [J].

CLARK, REH ;

SAMPSON, DH ;

GOETT, SJ .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1982, 49 (04) :545-554

[5] SCALED COULOMB-BORN-OPPENHEIMER COLLISION STRENGTHS FOR HYDROGENIC IONS IN LIMIT Z= INFINITY [J].

GOLDEN, LB ;

SAMPSON, DH .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1978, 38 (01) :19-28

[6] SCALED COLLISION STRENGTHS FOR HYDROGENIC IONS [J].

GOLDEN, LB ;

CLARK, REH ;

GOETT, SJ ;

SAMPSON, DH .

ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES, 1981, 45 (04) :603-612

[7] THE ATOMIC AND MOLECULAR DATABASE AT BELFAST AND DARESBURY [J].

HUGHES, JG ;

SMITH, FJ ;

BERRINGTON, KA ;

AGGARWAL, KM ;

ELDER, M .

COMPUTER PHYSICS COMMUNICATIONS, 1984, 33 (1-3) :99-103

[8] SEMIEMPIRICAL FORMULAS FOR ELECTRON-IMPACT EXCITATION AND IONIZATION OF HYDROGENIC IONS [J].

SAMPSON, DH ;

ZHANG, HL .

ASTROPHYSICAL JOURNAL, 1988, 335 (01) :516-524

[9] RELATIVISTIC DISTORTED-WAVE COLLISION STRENGTHS AND OSCILLATOR-STRENGTHS FOR F-LIKE IONS WITH 22-LESS-THAN-OR-EQUAL-TO-Z-LESS-THAN-OR-EQUAL-TO-92 [J].

SAMPSON, DH ;

ZHANG, HL ;

FONTES, CJ .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1991, 48 (01) :25-90

[10] RELATIVISTIC DISTORTED-WAVE COLLISION STRENGTHS AND OSCILLATOR-STRENGTHS FOR THE 71 NA-LIKE IONS WITH 22 LESS-THAN-OR-EQUAL-TO Z LESS-THAN-OR-EQUAL-TO 92 [J].

SAMPSON, DH ;

ZHANG, HL ;

FONTES, CJ .

ATOMIC DATA AND NUCLEAR DATA TABLES, 1990, 44 (02) :209-271