Target Structure-Induced Suppression of the Ionization Cross Section for Low-Energy Antiproton-Molecular Hydrogen Collisions: Theoretical Confirmation

被引：26

作者：

Abdurakhmanov, I. B. ^{[1
]}

Kadyrov, A. S. ^{[1
]}

Fursa, D. V. ^{[1
]}

Bray, I. ^{[1
]}

机构：

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

来源：

PHYSICAL REVIEW LETTERS | 2013年 / 111卷 / 17期

基金：

澳大利亚研究理事会;

关键词：

ANTIHYDROGEN; ELECTRON; IMPACT;

D O I：

10.1103/PhysRevLett.111.173201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Theoretical confirmation of the experimentally observed phenomenon [Knudsen et al., Phys. Rev. Lett. 105, 213201 (2010)] of target structure-induced suppression of the ionization cross section for low-energy antiproton-molecular hydrogen collisions is given. To this end a novel time-dependent convergent close-coupling approach to the scattering problem that accounts for all possible orientations of the molecular target, has been developed. The approach is applied to study single ionization of molecular hydrogen on the wide energy range from 1 keV to 2 MeV with a particular emphasis on low energies. Results for the orientation-averaged total single ionization cross section are compared with available experimental data and good agreement is found at low (< 20 keV) and high (> 90 keV) energies. A minor discrepancy is found within a small energy gap near the maximum of the cross section.

引用

页数：6