Features of positronium migration in a solid containing nanopores, by an example of sorption and annihilation of positrons in vaterite

被引：2

作者：

Shantarovich V.P. ^{[1
]}

Berdonosov S.S. ^{[2
]}

Znamenskaya I.V. ^{[2
]}

Melikhov I.V. ^{[2
]}

Gustov V.V. ^{[1
]}

Kevdina I.B. ^{[1
]}

机构：

[1] Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow

[2] Lomonosov State University, Moscow

来源：

Radiochemistry | 2006年 / 48卷 / 5期

基金：

俄罗斯基础研究基金会;

关键词：

66.30.-h; 78.70.Bj; 82.30.Gg;

D O I：

10.1134/S1066362206050195

中图分类号：

学科分类号：

摘要：

The features of migration of positrons in the bulk of vaterite (metastable modification of CaCO3) were studied using positron annihilation lifetime spectroscopy (PALS). Comparison of the lifetime of ortho-positronium determined from the PALS data, which corresponds to the time of its residence in the vaterite nanopores, with the absorption results (BET adsorption isotherm) allowed evaluation of the diffusion coefficient of positronium in the perfect sections of the vaterite crystal lattice, equal to 0.4 × 10-1 cm2 s-1. © 2006 Nauka/Interperiodica.

引用

页码：505 / 508

页数：3