Thermal stability of radiation-induced free radicals in γ-irradiated L-alanine single crystals

被引：8
|
作者：
Maltar-Strmecki, N
Rakvin, B
机构：
[1] Rudjer Boskovic Inst, Zagreb 10002, Croatia
[2] Univ Zagreb, Fac Vet Med, Zagreb 10002, Croatia
来源：
APPLIED RADIATION AND ISOTOPES | 2005年 / 63卷 / 03期
关键词：
D O I：
10.1016/j.apradiso.2005.04.010
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
Decay of the radiation-induced stable free radicals in L-alanine single crystals and powders at the temperatures from 379 to 476 K was examined by electron paramagnetic resonance. For single crystals, the calculated activation energy of the radical decay is 104.3 +/- 1.7 kJ/mol (i.e. 12 538 +/- 202 K) and the frequency factor lnv(o) is 24.1 +/- 0.4 min(-1). The lifetime of the radical in single crystals at 296 K is 162 years. The results confirm the long-term stability of the radicals, but the decay was found to be faster in large crystals than in powders. (c) 2005 Elsevier Ltd. All rights reserved.
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页码：375 / 380
页数：6
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