Electron-impact single and double ionization of W

被引：13

作者：

Pindzola, M. S. ^{[1
]}

Loch, S. D. ^{[1
]}

Foster, A. R. ^{[2
]}

机构：

[1] Auburn Univ, Dept Phys, Auburn, AL 36849 USA

[2] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2017年 / 50卷 / 09期

基金：

美国国家科学基金会;

关键词：

electron; ionization; atoms; CROSS-SECTIONS; TUNGSTEN; ATOM;

D O I：

10.1088/1361-6455/aa66e6

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Electron-impact single and double ionization cross sections for the W atom are calculated using a semi-relativistic distorted-wave method. The cross sections include contributions from single direct ionization, double direct ionization and excitation-autoionization. Branching ratio calculations are made to determine whether an excitation may contribute to single or double ionization. We check the accuracy of the semi-relativistic distorted-wave calculations for direct ionization of various subshells by comparison with fully-relativistic distorted-wave calculations. We also check the accuracy of the perturbative distorted-wave calculations for direct ionization of the outer most subshells by comparison with non-perturbative time-dependent close-coupling calculations.

引用

收藏

页数：7

相关论文

共 22 条

[1] SPECTROSCOPIC DETERMINATION OF IMPURITY INFLUX FROM LOCALIZED SURFACES [J].

BEHRINGER, K ;

SUMMERS, HP ;

DENNE, B ;

FORREST, M ;

STAMP, M .

PLASMA PHYSICS AND CONTROLLED FUSION, 1989, 31 (14) :2059-2099

[2] COULOMB BORN APPROXIMATION FOR ELECTRON-SCATTERING FROM NEUTRAL ATOMS - APPLICATION TO ELECTRON-IMPACT IONIZATION OF HELIUM IN COPLANAR SYMMETRICAL GEOMETRY [J].

BOTERO, J ;

MACEK, JH .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1991, 24 (16) :L405-L411

[3] Application of the time-dependent close-coupling approach to few-body atomic and molecular ionizing collisions [J].

Colgan, J. ;

Pindzola, M. S. .

EUROPEAN PHYSICAL JOURNAL D, 2012, 66 (11)

[4]

Cowan R. D., 1981, THEORY ATOMIC STRUCT

[5]

Fischer CF., 1977, Hartree-Fock method for atoms

[6] Impact of carbon and tungsten as divertor materials on the scrape-off layer conditions in JET [J].

Groth, M. ;

Brezinsek, S. ;

Belo, P. ;

Beurskens, M. N. A. ;

Brix, M. ;

Clever, M. ;

Coenen, J. W. ;

Corrigan, C. ;

Eich, T. ;

Flanagan, J. ;

Guillemaut, C. ;

Giroud, C. ;

Harting, D. ;

Huber, A. ;

Jachmich, S. ;

Kruezi, U. ;

Lawson, K. D. ;

Lehnen, M. ;

Lowry, C. ;

Maggi, C. F. ;

Marsen, S. ;

Meigs, A. G. ;

Pitts, R. A. ;

Sergienko, G. ;

Sieglin, B. ;

Silva, C. ;

Sirinelli, A. ;

Stamp, M. F. ;

van Rooij, G. J. ;

Wiesen, S. .

NUCLEAR FUSION, 2013, 53 (09)

[7] The flexible atomic code [J].

Gu, Ming Feng .

CANADIAN JOURNAL OF PHYSICS, 2008, 86 (05) :675-689

[8] Ionization of W and W+ by electron impact [J].

Kwon, Duck-Hee ;

Rhee, Yong-Joo ;

Kim, Yong-Ki .

INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 2006, 252 (03) :213-221

[9] Electron-impact ionization of atomic ions in the W isonuclear sequence [J].

Loch, SD ;

Ludlow, JA ;

Pindzola, MS ;

Whiteford, AD ;

Griffin, DC .

PHYSICAL REVIEW A, 2005, 72 (05)

[10] Erosion of tungsten and carbon markers in the outer divertor of ASDEX-Upgrade [J].

Mayer, M. ;

Rohde, V. ;

Ramos, G. ;

Vainonen-Ahlgren, E. ;

Likonen, J. ;

Chen, J. L. .

PHYSICA SCRIPTA, 2007, T128 :106-110