论文部分内容阅读
一、引言迄今为止的理论和实践都指出,强度为I_0的准直窄束γ射线通过厚为X的均匀介质后,其强度衰减为:
I. INTRODUCTION So far theory and practice have pointed out that a collimated narrow-beam γ-ray of intensity I_0 passes through a uniform medium of thickness X and its intensity attenuation is: