The effect of γ-irradiation on positronium formation in polyethylene

被引：17

作者：

Hirade, T

Kumada, T

机构：

[1] Japan Atom Energy Res Inst, Dept Mat Sci, Tokai, Ibaraki 3191195, Japan

[2] Japan Atom Energy Res Inst, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan

来源：

RADIATION PHYSICS AND CHEMISTRY | 2001年 / 60卷 / 4-5期

关键词：

positronium; poly(ethylene); gamma-irradiation; radicals;

D O I：

10.1016/S0969-806X(00)00401-1

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 effect of gamma -irradiation on positronium (Ps) formation, especially the decrement of Ps formation at room temperature, was studied in linear poly(ethylene). We found that chemical changes, such as oxidation, cross-linking, or radicals created by gamma -irradiation of similar to 50 kGy do not affect Ps formation very much. The decrement of Ps formation was probably caused by a temporary change of physical structure by irradiation that disappears by anneals in the temperature range from room temperature to 120 degreesC, gradually. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：541 / 544

页数：4

共 13 条

[1] Electron beam and gamma irradiation effects on high density polyethylene studied via positron annihilation lifetime spectroscopy [J].