Specific Activities of 60Co and 152Eu in Samples Collected from the Atomic-Bomb Dome in Hiroshima

URI http://harp.lib.hiroshima-u.ac.jp/hbg/metadata/5689
File
Title
Specific Activities of 60Co and 152Eu in Samples Collected from the Atomic-Bomb Dome in Hiroshima
Author
氏名 岡 隆光
ヨミ オカ タカミツ
別名 Oka Takamitsu
氏名
ヨミ イワタニ カズオ
別名 Iwatani Kazuo
氏名 葉佐井 博巳
ヨミ ハサイ ヒロミ
別名 Hasai Hiromi
氏名 静間 清
ヨミ シズマ キヨシ
別名 Shizuma Kiyoshi
氏名
ヨミ モリシマ ヒロシゲ
別名 morishima Hiroshige
氏名 星 正治
ヨミ ホシ マサハル
別名 Hoshi Masaharu
Abstract

Neutron induced activity/60Co/ 152Eu /Atomic Bomb/Gamma-ray spectroscopy Neutron-induced activities ^Co and 152Eu have been measured for samples collected from the Atomic-Bomb Dome locating at 161 m from the hypocenter of the Hiroshima Bomb. Specific activities ^Co/ Co and 152Eu/Eu at the time of the detonation have been determined as 10.0+1.0 Bq mg"1 (steel sample S4) and 80+9Bqmg"1 (granite sample Gl), respectively. Detailed measurements of 60Co and 152Eu activities for samples collected from various locations of the Dome show almost no directional dependence whether the sample faced to the epicenter,or not, nor vertical height dependence between 17 m height and the ground level. In addition, 152Eu was not detected in the sample collected from the basement. It has been shown that the present ^Co activity value, the nearest steel one to the hypocenter, as well as other short distance data are systematically lower than the calculated values based on the neutron fluence of the DS86.

Journal Title
Journal of radiation research
Volume
33
Issue
2
Spage
151
Epage
162
Published Date
1992-06
Language
eng
NIIType
Journal Article
Text Version
Old URI
Set
hbg