EPR and UV spectroscopic investigations of sucrose irradiated with heavy-ion particles
EPR and UV spectroscopic investigations of sucrose irradiated with heavy-ion particles
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DOI：
10.1016/j.radmeas.2009.07.003
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发表时间：
2010-01-01
影响因子：
2
通讯作者：
Yordanov, Nicola D.
中科院分区：
文献类型：
--
作者：
Karakirova, Yordanka;Nakagawa, Kouichi;Yordanov, Nicola D.
本文用EPR和UV光谱研究了C和Si离子辐照结晶蔗糖。在20-300戈伊范围内的不同辐射剂量下处理样品，对于C离子，线性能量传递（LET）值为39.6、49和58 keV μ m（-1），对于Si离子，线性能量传递（LET）值为60 keV μ m（-1）。所有样品表现出相同的EPR谱由于辐射诱导的稳定的蔗糖自由基。在一定的LET下，EPR信号响应与Si和C离子的吸收剂量呈线性关系。辐照蔗糖的水溶液在267 nm处表现出紫外吸收最大值，这是由于自由基复合的产物。该带的强度在用Si照射时比用C离子照射时强。紫外吸收比EPR信号对重离子种类辐照更敏感。(C)2009爱思唯尔有限公司保留所有权利。
Crystalline sucrose irradiated with C and Si ions is investigated with EPR and UV spectroscopy. Samples are treated at different doses of radiation in the region 20-300 Gy and linear energy transfer (LET) values of 39.6, 49 and 58 keV mu m(-1) for C ions and 60 keV mu m(-1) for Si ions. All samples exhibit identical EPR spectra due to radiation-induced stable sucrose radicals. At given constant LET the EPR signal responses are linear to the absorbed doses of Si and C ions. Water solutions of irradiated sucrose exhibit UV absorption maximum at 267 nm due to the product of radical recombination. The intensity of this band is stronger at irradiation with Si than with C ions. UV absorption is more sensitive to heavy-ion species irradiation than the EPR signals. (C) 2009 Elsevier Ltd. All rights reserved.