CORRELATION BETWEEN THE ORTHO-POSITRONIUM PICK-OFF ANNIHILATION LIFETIME AND THE FREE-VOLUME IN MOLECULAR LIQUIDS AND POLYMERS

被引：45

作者：

KOBAYASHI, Y ^{[1
]}

HARAYA, K ^{[1
]}

KAMIYA, Y ^{[1
]}

HATTORI, S ^{[1
]}

机构：

[1] IND PROD RES INST, TSUKUBA, IBARAKI 305, JAPAN

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 1992年 / 65卷 / 01期

关键词：

D O I：

10.1246/bcsj.65.160

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A good correlation between the ortho-positronium (omicron-Ps) pick-off annihilation lifetime and the free volume, computed as the difference between the specific volume at room temperature and that at 0 K, is reported for molecular liquids and polymers. Bondi's group contribution approach was employed for estimating the specific volume at 0 K. The omicron-Ps lifetimes in molecular solids, such as phenanthrene deviate considerably from the correlation. It is suggested that a bubble may be formed around Ps in liquids and polymers, but not in the low-molecular-weight crystalline solids. A correlation is presented between the diffusion coefficients of Ar and the lifetimes of omicron-Ps in both liquids and polymers.

引用

页码：160 / 163

页数：4

共 26 条

[1] VAN DER WAALS VOLUMES + RADII [J].