A Simulated Neutron Activation Experiment : Dose Estimation from Residual and Fallout Radioactivity

概要

論文の詳細を見る
Soil and various building materials from Hiroshima and Nagasaki were irradiated with neutrons and their induced radioactivities were determined. Based on these measurments the dose rates and cumulative doses from the induced gamma-emitters in Hiroshima and Nagasaki were estimated. The cumulative dose to infinity at the hypocenter was 80 rads in Hiroshima and 30 rads in Nagasaki. The radiation doses from residual radioactivity on the bombarded areas have been estimated from areal surveys of radioactivity (see the preceding review by Takeshita). Another approach is by simulated neutron activation experiments. In early 1960s, Shono and Arakawa estimated gamma ray doses from the residual radioactivity with the use of some neutron activation experirnents of soil from Hiroshima and Nagasaki. However, their results varied a great deal depending also upon the methods of calculation. With recent advances in quantitative dosimetery and in gamma ray spectroscopy, the authors re-estimated the external radiation doses due to gamma-rays by simulated neutron activation experiments of soil and building materials.
日本放射線影響学会の論文