Low-energy positron collisions with water: elastic and rotationally inelastic scattering

被引：38

作者：

Baluja, K. L. ^{[1
]}

Zhang, Rui

Franz, Jan

Tennyson, Jonathan

机构：

[1] Univ Delhi, Dept Phys & Astrophys, Delhi 110007, India

[2] UCL, Dept Phys & Astron, London WC1E 6BT, England

来源：

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS | 2007年 / 40卷 / 17期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1088/0953-4075/40/17/018

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Differential, integral and momentum transfer cross sections for the vibrationally elastic and rotationally inelastic scattering of positrons from water at low collision energy ( E <= 10 eV) are reported. Several models within the R-matrix method are used to compute the body-fixed T-matrices, while the scattering calculations are performed within the fixed-nuclei approximation corrected with the standard Born-closure formula. These calculations are compared with experimental results for elastic scattering, and the best model gives reasonable agreement with the most recent measurements (Zecca et al 2006 J. Phys. B: At. Mol. Opt. Phys. 39 1597) but not with some earlier studies. The relative contribution of the rotationally inelastic processes is investigated and comparisons are made with the equivalent electron scattering cross sections.

引用

页码：3515 / 3524

页数：10

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