241Am火警源表面有的金属覆盖层使得这种放射源“输出”的α粒子能量降低(一般为2.90～4.95MeV),α能谱展宽(半宽度为0.50～1.36MeV),且α能谱的峰能量和半宽度在一定范围内各不相同。以往没有适于这种放射源α能谱的分析方法,常常出现生产的产品不合格、用户退货的现象,产品质 The metal coating on the surface of 241Am fire source reduced the energy of α particle output from this source (usually 2.90 ~ 4.95MeV), α spectrum broadened (half width of 0.50 ~ 1.36MeV) Peak energy and half-width in a certain range of different. In the past, there was no analytical method suitable for this alpha-spectrum of radioactive sources, which often resulted in substandard products, returned goods users,