抄録
Scattered γ-rays were measured with 5-in. diameter by 5-in. long NaI(Tl) scintillator for the purpose of obtaining information on the transmission of 60Co γ-rays incident to polyethylene and iron slabs, and layered combinations thereof. The primary γ-rays were collimated, and the detector was used without collimator. The spectra of scattered γ-rays above 300 keV were quite similar to each other irrespective of material and thickness when the scattering angle and scatterer thickness in mean free path units were normalized.
