【摘要】 本文采用解簇射方程得到的电子在物质中的近似轫致辐射谱和单π交换近似下的光生π的微分截面在PDP-11/23机上计算了能量为1.2GeV的电子在Be、C、Al、Cu和Pt等五种物质靶的情形下产生的π介子产额,并对产生角θ进行了优化;为给靶厚的选取有所依据,还给出了产额与靶厚的关系。更多还原

【Abstract】 Using the spectrum of bremsstrahlung obtained by solving shower equation of electrons in matter and the differential cross section of photoproduction of pions in OPE approximation, we calculate by PDP-11/23 the pion yields results from 1.2 GeV electrons bombarding on different targets, Be, C, AI, Cu and Pt. The optimization is made for pion yields to find the optimistic production angle. In order to choose the thickness of the target, the curves of pion yields vs. Target thickness are given.更多还原