Effective collision strengths for allowed transitions among the n≤5 degenerate levels of Al XIII

被引：4

作者：

Aggarwal, K. M. ^{[1
]}

Igarashi, A. ^{[2
]}

Keenan, F. P. ^{[1
]}

Nakazaki, S. ^{[2
]}

机构：

[1] Queens Univ Belfast, Astrophys Res Ctr, Sch Phys & Mat, Belfast BT7 1NN, Antrim, North Ireland

[2] Miyazaki Univ, Fac Engn, Dept Appl Phys, Miyazaki 8892192, Japan

来源：

ASTRONOMY & ASTROPHYSICS | 2008年 / 479卷 / 02期

关键词：

atomic data; atomic processes;

D O I：

10.1051/0004-6361:20078933

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aims. In this paper we report on calculations of collision strengths and effective collision strengths for allowed transitions among the n <= 5 degenerate levels of Al XIII. Methods. The Dirac atomic R-matrix code (DARC) has been adopted for these calculations. Results. Collision strengths are reported over a wide energy range below 300 Ryd, and effective collision strengths are provided for electron temperatures of 4.4 <= log T-e <= 6.8 K.

引用

页码：585 / 588

页数：4

共 8 条

[1] Electron impact excitation of A1 XIII: A relativistic approach [J].

Aggarwal, KM ;

Keenan, FP ;

Rose, SJ .

ASTRONOMY & ASTROPHYSICS, 2005, 432 (03) :1151-1155

[2] Electron impact excitation of Al XIII: Collision strengths and rate coefficients [J].

Aggarwal, KM ;

Keenan, FP ;

Rose, SJ .

PHYSICA SCRIPTA, 2001, 63 (02) :95-103

[3] Electron scattering by Fe XXII within the Dirac R-matrix approach [J].

AitTahar, S ;

Grant, IP ;

Norrington, PH .

PHYSICAL REVIEW A, 1996, 54 (05) :3984-3989

[4] 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-&

[5] Indirect X-ray line-formation processes in iron L-shell ions [J].

Gu, MF .

ASTROPHYSICAL JOURNAL, 2003, 582 (02) :1241-1250

[6] Electron-exchange effect in electron-impact excitation of the n=2 fine-structure levels of hydrogenic ions [J].

Igarashi, A ;

Ohsaki, A ;

Nakazaki, S .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2005, 74 (01) :321-325

[7] Electron-impact excitations between the n=2 fine-structure levels of hydrogenic ions [J].

Igarashi, A ;

Horiguchi, Y ;

Ohsaki, A ;

Nakazaki, S .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 2003, 72 (02) :307-312

[8] IMPACT EXCITATION OF THE N=2 FINE-STRUCTURE LEVELS IN HYDROGENLIKE IONS BY PROTONS AND ELECTRONS [J].

ZYGELMAN, B ;

DALGARNO, A .

PHYSICAL REVIEW A, 1987, 35 (10) :4085-4100

← 1 →