Low-energy positron interactions with krypton

被引：37

作者：

Makochekanwa, C. ^{[1
]}

Machacek, J. R. ^{[1
]}

Jones, A. C. L. ^{[1
]}

Caradonna, P. ^{[1
]}

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

McEachran, R. P. ^{[1
]}

Sullivan, J. P. ^{[1
]}

Buckman, S. J. ^{[1
]}

Bellm, S. ^{[2
]}

Lohmann, B. ^{[2
]}

Fursa, D. V. ^{[3
]}

Bray, I. ^{[3
]}

Mueller, D. W. ^{[4
]}

Stauffer, A. D. ^{[5
]}

Hoshino, M. ^{[6
]}

机构：

[1] Australian Natl Univ, Res Sch Phys & Engn, ARC Ctr Antimatter Matter Studies, Canberra, ACT 0200, Australia

[2] Univ Adelaide, ARC Ctr Antimatter Matter Studies, Adelaide, SA, Australia

[3] Curtin Univ Technol, ARC Ctr Antimatter Matter Studies, Perth, WA 6845, Australia

[4] Univ N Texas, Dept Phys, Denton, TX 76201 USA

[5] York Univ, Dept Phys & Astron, Toronto, ON M3J 2R7, Canada

[6] Sophia Univ, Dept Phys, Chiyoda Ku, Tokyo 102, Japan

来源：

PHYSICAL REVIEW A | 2011年 / 83卷 / 03期

基金：

澳大利亚研究理事会;

关键词：

CLOSE-COUPLING CALCULATIONS; TOTAL CROSS-SECTIONS; IMPACT IONIZATION; SCATTERING; HYDROGEN; NE; AR; HE; ATOMS; XE;

D O I：

10.1103/PhysRevA.83.032721

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Cross sections for positron scattering from krypton have been measured with an energy resolution of similar to 60 meV over the energy range 0.5-60 eV. Absolute values of the grand total (sigma(GT)), positronium formation (sigma(Ps)), and grand total minus positronium formation (sigma(GT) - sigma(Ps),) cross sections are presented. Theoretical estimations of sGT and sigma(GT) - sigma(Ps) are also performed for this target using the convergent close-coupling method and the relativistic optical potential approach. We also provide experimental and theoretical results for elastic differential cross sections, for selected energies both below and above the Ps threshold. Where available, the present results are compared to both experimental and theoretical values from the literature.

引用

页数：12

共 44 条

[1] POSITRON SCATTERING FROM RARE-GASES (HE, NE, AR, KR, XE, AND RN) - TOTAL CROSS-SECTIONS AT INTERMEDIATE AND HIGH-ENERGIES [J].

BALUJA, KL ;

JAIN, A .

PHYSICAL REVIEW A, 1992, 46 (03) :1279-1290

[2] Direct ionization of heavy noble gases by positron impact [J].

Bartschat, K .

PHYSICAL REVIEW A, 2005, 71 (03)

[3] CONVERGENT CLOSE-COUPLING CALCULATIONS OF ELECTRON-HYDROGEN SCATTERING [J].

BRAY, I ;

STELBOVICS, AT .

PHYSICAL REVIEW A, 1992, 46 (11) :6995-7011

[4] CONVERGENT CLOSE-COUPLING CALCULATIONS OF LOW-ENERGY POSITRON ATOMIC-HYDROGEN SCATTERING [J].

BRAY, I ;

STELBOVICS, AT .

PHYSICAL REVIEW A, 1993, 48 (06) :4787-4789

[5] Positron impact ionization of He, Ne, and Ar [J].

Campeanu, RI ;

McEachran, RP ;

Stauffer, AD .

CANADIAN JOURNAL OF PHYSICS, 1996, 74 (7-8) :544-547

[6] Positron impact ionization of krypton and xenon [J].

Campeanu, RI ;

McEachran, RP ;

Stauffer, AD .

CANADIAN JOURNAL OF PHYSICS, 1999, 77 (10) :769-774

[7] Distorted-wave models in positron impact ionization of atoms [J].

Campeanu, RI ;

McEachran, RP ;

Stauffer, AD .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2002, 192 (1-2) :146-149

[8] MEASUREMENT OF TOTAL CROSS-SECTIONS FOR POSITRONS OF ENERGIES 2-400 EV IN HE, NE, AR, AND KR [J].

CANTER, KF ;

COLEMAN, PG ;

GRIFFITH, TC ;

HEYLAND, GR .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 1973, 6 (08) :L201-L203

[9] High-resolution positron scattering from helium: Grand total and positronium-formation cross sections [J].

Caradonna, P. ;

Jones, A. ;

Makochekanwa, C. ;

Slaughter, D. S. ;

Sullivan, J. P. ;

Buckman, S. J. ;

Bray, I. ;

Fursa, D. V. .

PHYSICAL REVIEW A, 2009, 80 (03)

[10] Ab initio optical potentials for elastic electron and positron scattering from the heavy noble gases [J].

Chen, S. ;

McEachran, R. P. ;

Stauffer, A. D. .

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS, 2008, 41 (02)

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