Positronium in large voids. Silicagel

被引：81

作者：

Goworek, T

Ciesielski, K

Jasinska, B

Wawryszczuk, J

机构：

[1] Institute of Physics, Marie Curie-Skłodowska Univ.

来源：

CHEMICAL PHYSICS LETTERS | 1997年 / 272卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(97)00504-6

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：

The lifetime spectra of positrons annihilating in a porous medium (silicagel) were measured as a function of temperature. In the low temperature limit the lifetime of o-Ps in the pores agrees rather well with the popular Tao-Eldrup formula. With the rise of temperature the second long-lived component grows; that component was identified as o-Ps annihilation from the Ip-like state in the potential well. The lifetimes of o-Ps in various states of the spherical well have been calculated. The experimental value of the lifetime for the Ip state is in good agreement with the model calculation. (C) 1997 Elsevier Science B.V.

引用

页码：91 / 95

页数：5

共 13 条

[1] The analysis of non-exponential decay in relation to positronium thermalization [J].