Effect of specific energy of heavy ions for 1,2,4,5-tetracyanobenzene radical anion formation

被引：6

作者：

Taguchi, M ^{[1
]}

Matsumoto, Y

Moriyama, M

Namba, H

Aoki, Y

Hiratsuka, H

机构：

[1] Japan Atom Energy Res Inst, Takasaki Radiat Chem Res Estab, Takasaki, Gumma 3701292, Japan

[2] Gunma Univ, Dept Chem, Kiryu, Gumma 3768515, Japan

来源：

RADIATION PHYSICS AND CHEMISTRY | 2000年 / 58卷 / 02期

关键词：

ion beam; track structure; fluence dependence; LET effect; 1,2,4,5-tetracyanobenzene;

D O I：

10.1016/S0969-806X(99)00368-0

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 absorption spectrum of poly(vinyl alcohol) (PVA) film doped with 1,2,4,5-tetracyanobenzene (TCNB) was measured after the irradiation with several hundred MeV of C, Ne and Ar ions. The absorbance due to the TCNB radical anion increased and then decreased with increasing the fluence for all ions. The fluence dependence of the absorbance was analyzed by use of the "chemical" track model with a cylindrical structure. As a result, the estimated radius of the chemical track decreases for C and Ne ions with increasing specific energy (ion energy per atomic mass unit). Furthermore, at the same specific energy, the radius increases with increasing ion mass. The formation yield (G-value) of the TCNB radical anion estimated by optical absorbance and ESR measurements was smaller than that by gamma-ray irradiation. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：123 / 129

页数：7

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