摘要
用3．5μm厚Mylar膜作为标准样品，对1．4～2．5MeV范围不同能量下PESA测量刻度系数进行测量。结果在此能量范围内不同能量下平均刻度系数差别小于10％。用2．5MeV质子束，对单层，双层和三层3．5μn厚Mvlar分别进行PESA测量，它们平均刻度系数相差在3％以内。结果表明：对厚度小于9mg／cm^2气溶胶样品或2．5MeV质子穿透过程中能量损失小于1．1MeV其他样品，2．5MeVPESA测量是可以用单标准样品进行刻度。
Proton Elastic Scattering Analysis （PESA） facilities with proton energy from 1.4 - 2.5MeV were calibrated used 3.5tan Mylar film, and it was shown that the difference of the calibrate coefficients in different energy is less than 10%. Single, double and triple layers of 3.5tun Mylar film were used to calibrate the 2.5MeV PESA method, their calibrate coefficients differ within 3 %. These results indicate that the 2.5MeV PESA method which calibrated by single standard sample is valid for measuring of H content of aerosol samples accompanied with PIXE analysis, and it＇ s also valid for analysis of any other samples through which the energy loss of 2.5MeV proton is less than 1.1MeV.
出处
《现代仪器》
2006年第1期19-21,共3页
Modern Instruments
基金
国家自然科学基金资助项目
项目编号10275006
