POSITRON STATES BETWEEN POSITRONIUM AND FREE POSITRON STATES IN CONDENSED MATTER

被引：4
|
作者：
MOGENSEN, OE
机构：
[1] Chemistry Department, Japan Atomic Research Institute, Ibaraki-ken, 319-11, Tokai-mura
来源：
HYPERFINE INTERACTIONS | 1994年 / 84卷 / 1-4期
关键词：
D O I：
10.1007/BF02060686
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Positronium (Ps), the bound state of an electron and a positron, is formed in many insulating solids and liquids. Recently, several cases of a transition from a Ps state to a non-Ps state have been observed. This has been found for liquid CS2 if the temperature is decreased from about -40-degrees-C to the melting point, -110.8-degrees-C. In some solid aromatic hydrocarbons, such as naphthalene, biphenyl and p-terphenyl, similar transitions occur upon decreasing the temperature. These transitions are unique in physics since Ps is the only bound state of two light particles in normal low-energy physics. Measurements of the positron lifetime, angular correlation of the annihilation radiation, Ps chemical reactions, and Zeeman effect of Ps give information on the transitions.
引用
收藏
页码：377 / 387
页数：11
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