Threshold Photodetachment in a Repulsive Potential

被引：9

作者：

Lindahl, A. O. ^{[1
]}

Rohlen, J. ^{[1
]}

Hultgren, H. ^{[1
,2
]}

Kiyan, I. Yu ^{[2
]}

Pegg, D. J. ^{[3
]}

Walter, C. W. ^{[4
]}

Hanstorp, D. ^{[1
]}

机构：

[1] Univ Gothenburg, Dept Phys, SE-41296 Gothenburg, Sweden

[2] Univ Freiburg, D-79104 Freiburg, Germany

[3] Univ Tennessee, Dept Phys, Knoxville, TN 37996 USA

[4] Denison Univ, Dept Phys & Astron, Granville, OH 43023 USA

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 03期

基金：

瑞典研究理事会; 美国国家科学基金会; 美国安德鲁·梅隆基金会;

关键词：

NEGATIVE-IONS; ENERGIES; RANGE;

D O I：

10.1103/PhysRevLett.108.033004

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the first experimental observation of a new threshold behavior observed in the 5(2)G partial channel in photodetachment of K-. It arises from the repulsive polarization interaction between the detached electron and the residual K(5(2)G) atom, which has a large negative dipole polarizability. In order to account for the observation in the K(5(2)G) channel, we have developed a semiclassical model that predicts an exponential energy dependence for the cross section. The measurements were made with collinear laser-ion beams and a resonance ionization detection scheme.

引用

页数：5

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