THERMALIZATION OF POSITRONIUM IN LIQUIDS - TIME-DEPENDENCE AND INFLUENCE OF A CHEMICAL-REACTION

被引：15

作者：

BILLARD, I ^{[1
]}

ABBE, JC ^{[1
]}

DUPLATRE, G ^{[1
]}

机构：

[1] CTR RECH NUCL, BP 20, F-67037 STRASBOURG, FRANCE

来源：

JOURNAL OF PHYSICAL CHEMISTRY | 1991年 / 95卷 / 06期

关键词：

D O I：

10.1021/j100159a073

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Taking advantage of the magnetic field effect on positronium (Ps), the kinetic energy of this particle is measured in various solvents at different ages of Ps, using both the lifetime spectroscopy (LS) and the Doppler broadening of the annihilation radiation line shape (DBARL) techniques. The solvent is shown to influence both the Ps initial energy and its slowing down. Thermalization of Ps may last up to about 2 +/- 0.5 ns. In addition, the kinetic energy of Ps after a chemical spin conversion reaction is determined. The Ps atoms emerging from the reaction cage appear to be fully thermalized.

引用

页码：2501 / 2506

页数：6

共 41 条

[1] TEMPERATURE AND (POLAR) SOLVENT EFFECTS ON POSITRONIUM REACTIONS WITH NITROXYL FREE-RADICALS [J].