Abstract
Beta ray incident on the several elements comes from collimated 90Sr source. The backscattered beta ray of desired backscattering angle was detected by a collimated GM counter. The absorption curve of scattered beta ray showed that the energy of scattered ray decreases as the scattering angle increases, especially for low atomic number elements, and the difference of backscattering coefficient between each element increases as scattering angle increases.
Relation between saturation backscattering coefficient and atomic number of backscatterer was examined. To improve the sensitivity of analysis of higher atomic number elements in two component system, it was desirable that the scattered ray with maximum scattering angle must be detected by use of a filter.
