食品辐照技术中使用的丙氨酸-ESR剂量测量方法的研究-ESR测量条件的选定

波谱学杂志 ›› 1987, Vol. 4 ›› Issue (2): 161-170.

食品辐照技术中使用的丙氨酸-ESR剂量测量方法的研究-ESR测量条件的选定

高钧成¹, 盛沛根², 沈志民², 王载勇¹, 王华黎²

1. 中国计量科学研究院;
2. 中国科学院上海生物化学研究所

收稿日期:1986-09-22 修回日期:1986-11-10 出版日期:1987-06-05 发布日期:2018-01-22

STUDIES OF THE ALANINE/ESR DOSIMETRIC METHOD USED IN THE TECHNIQUE OF FOOD IRRADIATION-SELECTION OF THE CONDITIONS FOR ESR MEASUREMENT

Gao Juncheng¹, Sheng Peigen², Shen Zhimin², Wang Zaiyong¹, Wang Huali²

1. National Institute of Metrology, Beijing;
2. Shanghai Institute of Biochemistry, Academia Sinica

Received:1986-09-22 Revised:1986-11-10 Online:1987-06-05 Published:2018-01-22

摘要/Abstract

摘要： 鉴于丙氨酸辐照后形成的自由基很稳定,其总数在食品辐照常用的剂量范围(10²~10⁴Gy)内正比于辐照剂量,我们选定丙氨酸-ESR系统作为我国γ射线大剂量传递剂量计,并对它进行了研究,确定了正常的ESR测量条件。特别修正了波谱仪的增益系数之间的线性关系并计测了旋转样品管对信号幅度的影响。检测吸收剂量的下限为5Gy。在0.05~1k7Gy的范围内,对于以十种不同剂量辐照的丙氨酸样品,ESR波谱主峰幅度h与相应的剂量D之间的线性相关系数大于0.999。

关键词: γ射线剂量测量, 丙氨酸-ESR剂量计, 传递剂量计, 大剂量测量保证系统

Abstract: In view of the fact that the free radicals formed after irradiation of alanine were cousiderably stable and their total number, in the dose range commonly used for food irradiation (10²~10⁴Gy), was proportional to the irradiation dose, the alanine/ESR system was selected as the transfer dosimeter for measuring high-level doses of γ-rays in China, related studies were made and normal conditions for ESR measurement was established.Especially, the linear relations between gain settings of the spectrometer were amended and the effect of rotation of the specimen tube on the signal amplitude was quantified.The lower limit for detecting the absorbed dose was found to be 5 Gy. In the range of 0.05~17kGy, for alanine specimens irradiated with ten different doses, the linear correlation coefficient between the main peak amplitude h of the ESR spectrum and the corresponding dose D was greater than 0.999.

Key words: γ-ray dosimptry, alanine/ESR dosimeter, transfer dosimeter, high-level dosimetric assurance system

高钧成, 盛沛根, 沈志民, 王载勇, 王华黎. 食品辐照技术中使用的丙氨酸-ESR剂量测量方法的研究-ESR测量条件的选定[J]. 波谱学杂志, 1987, 4(2): 161-170.

Gao Juncheng, Sheng Peigen, Shen Zhimin, Wang Zaiyong, Wang Huali. STUDIES OF THE ALANINE/ESR DOSIMETRIC METHOD USED IN THE TECHNIQUE OF FOOD IRRADIATION-SELECTION OF THE CONDITIONS FOR ESR MEASUREMENT[J]. Chinese Journal of Magnetic Resonance, 1987, 4(2): 161-170.