放射能汚染魚類の放射性物質-II : 1656年の太平洋における放射能汚染カツオ(その1)

概要

論文の詳細を見る
The distribution of radioactivity and radioactive elements in two specimens (No. 6 and 13) of skipjacks, Katsuwonus pelamis, have been investigated, which were caught at a station (14°03N, 157°28E) in the Pacific Ocean on June 13, 1956 by the “SHUNKOTSU-MARU”. These specimens were less radio active, but more interesting than those in 1954, as they represented the more complicated patterns of contamination. The radioactive substances in the pyloric caeca of No. 13 specimen (13 P) were mostly composed of Zn65, some members of Group III B other than Zn65 and those belonging to Group II. Among them, Zn65 was again isolated and identified (Fig. 2-5.), as reported in the previous paper1, 3). In the pyloric caeca of No. 6 specimen (6P), on the other hand, no appreciable amount of Zn65 was found and the radioactivity of 6 P was mainly attributable to the radioelements of Group II. Members of Group II also took the major part of radioactivity in the liver of both specimens (6 L and 13 L) and those of Group III B in which Zn65 was included revealed only a slight activity. Group IV (alkali-earth metals) from 13 L was further fractionated, and Ba140 together with La140 were found to be responsible for the radioactivity of the group (Fig. 6). Furthermore, the presence of Fe55 was confirmed in 6 L (Fig. 7 and 8). And the remarkable emission of β-ray was also recognized in the fraction (6L-F2) obtained with an ionexchange resin (Fig. 7) and in Group II isolated from the fraction by group separation using carriers. The nuclide in this group are now under investigation.
公益社団法人日本水産学会の論文

放射能汚染魚類の放射性物質-II : 1656年の太平洋における放射能汚染カツオ(その1)

スポンサーリンク

概要

著者

関連論文

スポンサーリンク