Positronium lifetimes is porous Vycor glass

被引：84

作者：

Ciesielski, K

Dawidowicz, AL

Goworek, T

Jasinska, B

Wawryszczuk, J

机构：

[1] Marie Curie Sklodowska Univ, Inst Phys, PL-20031 Lublin, Poland

[2] Marie Curie Sklodowska Univ, Fac Chem, Dept Chem Phys, PL-20031 Lublin, Poland

来源：

CHEMICAL PHYSICS LETTERS | 1998年 / 289卷 / 1-2期

关键词：

D O I：

10.1016/S0009-2614(98)00416-3

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 ortho-positronium lifetimes in porous Vycor glass were measured in a wide range of pore radii. A good correlation of the most probable lifetime with the model accounting for the population of upper levels of a particle in the potential well was observed. For channel-like voids (capillaries in porous media) a new value of the empirical parameter, Delta R, entering in the semi-empirical Eldrup equation, is proposed: Delta R = (0.191 +/- 0.007) nm; it explains some of the discrepancies previously found in crystalline solids. (C) 1998 Elsevier Science B.V. All rights reserved.

引用

页码：41 / 45

页数：5

共 15 条

[1]

DAWIDOWICZ AL, 1979, CHEM ANAL-WARSAW, V23, P811

[2]

DRAKE JM, 1990, NEW J CHEM, V14, P77

[3] THE TEMPERATURE-DEPENDENCE OF POSITRON LIFETIMES IN SOLID PIVALIC ACID [J].