Photodetachment of Positronium Negative Ions

被引：58

作者：

Michishio, K. ^{[1
]}

Tachibana, T. ^{[1
]}

Terabe, H. ^{[1
]}

Igarashi, A. ^{[2
]}

Wada, K. ^{[3
]}

Kuga, T. ^{[4
]}

Yagishita, A. ^{[3
]}

Hyodo, T. ^{[3
]}

Nagashima, Y. ^{[1
]}

机构：

[1] Tokyo Univ Sci, Dept Phys, Shinjuku Ku, Tokyo 1628601, Japan

[2] Miyazaki Univ, Fac Engn, Miyazaki 8892192, Japan

[3] High Energy Accelerator Org KEK, Inst Mat Struct Sci, Tsukuba, Ibaraki 3050801, Japan

[4] Univ Tokyo, Inst Phys, Grad Sch Arts & Sci, Meguro Ku, Tokyo 1538902, Japan

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 15期

关键词：

DECAY-RATE; COULOMB INTERACTION; CROSS-SECTIONS; GROUND-STATE; ANNIHILATION; SCATTERING; ENERGY; PS(-); FACILITY; SYSTEMS;

D O I：

10.1103/PhysRevLett.106.153401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Photodetachment of the positronium negative ion, a bound state of one positron and two electrons, has been observed. Development of a method to produce the ions efficiently using a Na coated tungsten surface has enabled the first observation of the photodetachment. The obtained lower limit of the photodetachment cross section for the wavelength of 1064 nm is consistent with the theoretical calculations reported so far. The experimental field developed in the present work gives new opportunities to explore the quantum mechanical three-body problem and to develop energy-tunable positronium beams.

引用

页数：4

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