Absolute cross sections for near-threshold electron-impact excitation of the 2s 2S→2p 2P transition in C3+

被引：17

作者：

Bannister, ME ^{[1
]}

Chung, YS

Djuric, N

Wallbank, B

Woitke, O

Zhou, S

Dunn, GH

Smith, ACH

机构：

[1] Oak Ridge Natl Lab, Div Phys, Oak Ridge, TN 37831 USA

[2] Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[3] Natl Inst Stand & Technol, Boulder, CO 80309 USA

[4] UCL, London WC1E 6BT, England

[5] Chungnam Natl Univ, Dept Phys, Daejon 305764, South Korea

[6] St Francis Xavier Univ, Dept Phys, Antigonish, NS B2G 2W5, Canada

来源：

PHYSICAL REVIEW A | 1998年 / 57卷 / 01期

关键词：

D O I：

10.1103/PhysRevA.57.278

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Absolute total cross sections for electron-impact excitation of the 2s S-2-->2p P-2 transition in C3+ were measured from 7.35 eV to 8.35 eV using the merged electron-ion-beams energy-loss technique. The results settle the discrepancy between two previous experiments using the crossed-beams fluorescence method, being in very good agreement with the older results [P. O. Taylor, D. Gregory, G. H. Dunn, R. A. Phaneuf, and D. H. Crandall, Phys. Rev. Lett. 39, 1256 (1977)] but less so with the more recent ones [D. W. Savin, L, D. Gardner, D. B. Reisenfeld, A. R. Young, and J. L. Kohl, Phys. Rev. A 51, 2162 (1995)]. The present measurements are also in good agreement with unitarized Coulomb-Born and close-coupling calculations. [S1050-2947(98)04301-7].

引用

页码：278 / 281

页数：4

共 18 条

[1] Absolute cross sections for electron-impact single ionization of Ne-q+ (q=2,4-6) ions [J].

Bannister, ME .

PHYSICAL REVIEW A, 1996, 54 (02) :1435-1444

[2]

BANNISTER ME, UNPUB

[3] MERGED-BEAMS ENERGY-LOSS TECHNIQUE FOR ELECTRON-ION EXCITATION - ABSOLUTE TOTAL CROSS-SECTIONS FOR O5+(2S-]2P) [J].

BELL, EW ;

GUO, XQ ;

FORAND, JL ;

RINN, K ;

SWENSON, DR ;

THOMPSON, JS ;

DUNN, GH ;

BANNISTER, ME ;

GREGORY, DC ;

PHANEUF, RA ;

SMITH, ACH ;

MULLER, A ;

TIMMER, CA ;

WAHLIN, EK ;

DEPAOLA, BD ;

BELIC, DS .

PHYSICAL REVIEW A, 1994, 49 (06) :4585-4596

[4]

BENVENUTI P, 1996, SCI HUBBLE SPACE TEL, V2

[5] ATOMIC DATA FOR OPACITY CALCULATIONS .17. CALCULATION OF LINE BROADENING PARAMETERS AND COLLISION STRENGTHS BETWEEN N = 2, 3 AND 4 STATES IN C-IV [J].

BURKE, VM .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1992, 25 (22) :4917-4928

[6] Resonance interference and absolute cross sections in near-threshold electron-impact excitation of the 3s(2) S-1->3s3p P-3 and 3s(2) S-1->3s3p P-1 transitions in Ar6+ [J].

Chung, YS ;

Djuric, N ;

Wallbank, B ;

Dunn, GH ;

Bannister, ME ;

Smith, ACH .

PHYSICAL REVIEW A, 1997, 55 (03) :2044-2049

[7] A PROBE FOR REAL-TIME IMAGES OF PARTICLE BEAMS AND THEIR ANALYSES IN A MERGED-BEAMS APPARATUS [J].

FORAND, JL ;

TIMMER, C ;

WAHLIN, E ;

DEPAOLA, BD ;

DUNN, GH ;

SWENSON, DR ;

RINN, K .

REVIEW OF SCIENTIFIC INSTRUMENTS, 1990, 61 (11) :3372-3377

[8] EXCITATION OF LITHIUM-LIKE IONS BY ELECTRON-IMPACT [J].

GAU, JN ;

HENRY, RJW .

PHYSICAL REVIEW A, 1977, 16 (03) :986-990

[9] ABSOLUTE CROSS-SECTIONS FOR 2S-2P EXCITATION OF N-4(+) BY ELECTRON-IMPACT [J].

GREGORY, D ;

DUNN, GH ;

PHANEUF, RA ;

CRANDALL, DH .

PHYSICAL REVIEW A, 1979, 20 (02) :410-420

[10] EVIDENCE FOR SIGNIFICANT BACKSCATTERING IN NEAR-THRESHOLD ELECTRON-IMPACT EXCITATION OF AR7+(3S-]3P) [J].

GUO, XQ ;

BELL, EW ;

THOMPSON, JS ;

DUNN, GH ;

BANNISTER, ME ;

PHANEUF, RA ;

SMITH, ACH .

PHYSICAL REVIEW A, 1993, 47 (01) :R9-R12

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