CAJ | 학술논문

为了测量缺乏标准溶液的低能弱β放射性样品的活度,采用分布在低能区(0～150 keV)的6种β核素(~3H、~(241)Pu、~(106)Ru、~(63)Ni、~(151)Sm和~(14)C)的标准溶液刻度低本底液闪谱仪(Tricarb-3170)的探测效率.在此基础上,拟合出探测效率随淬灭指数和核素平均能量变化的三维曲面.对影响液闪测量的主要因素,如闪烁液、淬灭剂、介质、样品瓶、体积等进行了研究,确定了最佳测量条件.该方法刻度了仪器在整个低能区的探测效率,适用于所有低能β核素活度的快速准确测定.
위료측량결핍표준용액적저능약β방사성양품적활도,채용분포재저능구(0～150 keV)적6충β핵소(~3H、~(241)Pu、~(106)Ru、~(63)Ni、~(151)Sm화~(14)C)적표준용액각도저본저액섬보의(Tricarb-3170)적탐측효솔.재차기출상,의합출탐측효솔수쉬멸지수화핵소평균능량변화적삼유곡면.대영향액섬측량적주요인소,여섬삭액、쉬멸제、개질、양품병、체적등진행료연구,학정료최가측량조건.해방법각도료의기재정개저능구적탐측효솔,괄용우소유저능β핵소활도적쾌속준학측정.
In order to measure the radioactivity of pure beta-emitters, which are low energy, low level and lack of their standard solutions, an efficiency calibration method was developed by scaling the liquid scintillation spectrometer (LSA) with 6 low energy beta-nuclides. On the base of this method, a three-dimension surface on nuclides' average energy, quenching index and determining efficiency was fitted. Various factors possibly influencing the measurement of LSA were studied, such as scintillation fluids, quenched agents, medium, vials, volumes and so on, and the optimum conditions for LSA were obtained.