Abstract: A MEASURE ANALYSIS SYSTEM OF α SPECTRUM FOR 241Am FIRE ALARM SOURCEFeng Gensheng Wang Ying① Feng Xinzhan(China Institute of Atomic Energy, Beijing 102413)(①Software Department of the Chinese Academy of Sciences, Beijing 100080)ABSTRACTAccording to the spectrum characteristic of the α particle that emitted from 241Am fire alarm source and requirement to the α spectrum of the user, the way to measure and analyze the α spectrum of the source is studied and the semiautomatic system that suits to measure and analyze the α spectrum of the source is set up. The system are completely satisfied to measure and analyze the α spectrum of the source in the course of production the source, to examine the quality of the α spectrum before sending out the source for the producer and accepting the source for the user.Key words 241Am fire alarm source α spectrum analysis software of α spectrum