Experimental determination of the scattering length for positron scattering from krypton

被引：37

作者：

Zecca, A. ^{[1
]}

Chiari, L. ^{[1
,2
]}

Trainotti, E. ^{[1
]}

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

Bray, I. ^{[3
]}

Brunger, M. J. ^{[2
,4
]}

机构：

[1] Univ Trent, Dept Phys, I-38123 Trento, Italy

[2] Flinders Univ S Australia, ARC Ctr Antimatter Matter Studies, Sch Chem & Phys Sci, Adelaide, SA 5001, Australia

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

[4] Univ Malaya, Inst Math Sci, Kuala Lumpur 50603, Malaysia

来源：

EUROPEAN PHYSICAL JOURNAL D | 2011年 / 64卷 / 2-3期

关键词：

CROSS-SECTION MEASUREMENTS; LOW-ENERGY POSITRONS; NOBLE-GAS ATOMS; RARE-GASES; HYDROGEN; XENON; MOLECULES; ARGON;

D O I：

10.1140/epjd/e2011-20333-7

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report the first experimentally supported determination of the scattering length for positron scattering from krypton. Our result of -10.3 +/- A 1.5 a.u. compares favourably with that from a convergent close coupling calculation performed as a part of this investigation (-9.5 a.u.), and also with an earlier many body theory calculation of -10.1 a.u. from Gribakin and Ludlow [Phys. Rev. A 70, 032720 (2004)] and a polarized-orbital result of -10.4 a.u. from McEachran et al. [J. Phys. B 13, 1281 (1980)]. The present experimental scattering length supports the existence of a low-lying positron-krypton virtual state (Surko et al. [J. Phys. B 38, R57 (2005)]) at an energy epsilon = 0.13 eV.

引用

页码：317 / 321

页数：5

共 27 条

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