【作者】 张文在； 綦杰； 姚历农； 王晓静； 龚凌凌； 段利民；

【Author】 ZHANG Wen-zai, QI Jie,YAO Li-nong, WANG Xiao-jing, GONG Ling-ling, DUAN Li-min (China Institute of Atomic Energy.Bei Jing 102413,China)

【机构】 中国原子能科学研究院；

【摘要】 本文介绍了一个绝对测量γ放射源活度的等温γ量热计。该量热计的热输出器为一直径200mm,高354mm的铅圆柱体,测量元件同时采用了热敏电阻和热电偶。在没有恒温的条件下,在该装置上测量了一个约300居里的Co-60γ源和一个约160居里的Pu-238α源,热平衡时间约40小时,测量值扩展不确定度为5%。更多还原

【Abstract】 This paper introduces an isothermal gamma calorimeter which is used for absolute measurement of activity of gamma radioactive source. The shape of its thermal output device is a lead cylinder whose diameter and height are 200mm and 354mm, respectively. Its measuring components use thermal resistance and thermopair. Under the condition of no constant temperature, a about 300Ci Co-60 gamma source and a about 160Ci Pu-238 alpha source are measured by using this device. The thermal balance time is about 40 hours and the uncertainty of measured data is 5%.更多还原