Radiochromic properties of α-terthiophene-cellulose triacetate films

被引：3

作者：

Emmi, SS ^{[1
]}

Ceroni, P

Lavalle, M

Fuochi, PG

D'Angelantonio, M

Alberti, A

Macciantelli, D

Kovács, A

Takács, E

机构：

[1] CNR, Ist Fotochim & Radiaz Alta Energia, Via P Gobetti 101, I-40129 Bologna, Italy

[2] CNR, Ist Composti Contenenti Eteroatomi, I-40129 Bologna, Italy

[3] IISC, H-1525 Budapest, Hungary

来源：

RADIATION PHYSICS AND CHEMISTRY | 2000年 / 57卷 / 3-6期

关键词：

oligothiophenes; radiochromic films; solid state dosimeters; persistent radical cations;

D O I：

10.1016/S0969-806X(99)00437-5

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：

An alpha-terthiophene/cellulose triacetate film system exposed to gamma-rays and electron beam shows two new bands in the visible region of the spectrum. The absorbance at 490 nm is almost stable for a long time and responds linearly to the dose applied up to 400 kGy. A Second band developed at 700 nm depends on dose rate and may indicate a chain-growth. The main species responsible for the color change and EPR signal is likely to be an enlarged oligomer radical cation stabilized by a semiquinoid structure. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：707 / 710

页数：4

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