放射能汚染魚類の放射性物質-IV 分属分析による汚染メバチの放射性物質の分析

白井 和雄

doi:10.2331/suisan.23.723

放射能汚染魚類の放射性物質-IV

分属分析による汚染メバチの放射性物質の分析

白井和雄

著者情報

ジャーナルフリー

1958 年 23 巻 11 号 p. 723-728

DOI https://doi.org/10.2331/suisan.23.723

詳細

発行日: 1958/03/25 受付日: - J-STAGE公開日: 2008/02/29 受理日: 1957/09/30 早期公開日: - 改訂日: -
訂正情報
訂正日: 2008/02/29 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : In the previous papers on the radioelements in skipjacks, ¹⁾²⁾ the identification of Cd^113m as a main contaminant and the presence of Zn⁶⁵, Fe⁵⁵ and a trace of Ba¹⁴⁰-La¹⁴⁰ were reported.
The present paper deals with a contaminated big-eyed tuna, Parathunnus mebachi, caught at a station (12°17′N, 167°04′E) in the Pacific Ocean on Oct. 20, 1956. Data on the specimen are given in Table 1 and the radioactivity of tissues and organs is shown in Fig. 1.
The ashes of liver, pyrolic caeca, kidney, red muscle and ordinary muscle were fractionated by the group separation method using carriers and the considerable amount of radioactivity was found in Group II (Table 2).
Radioactive elements contained in Group II were proved to be mostly composed of Cd^113m and Cd^115m by the further fractionation (Fig. 2). The existence of these nuclides was confirmed by the half lives of Cd fractions (57-71 days when estimated directly and 43-44 days when traversed with 263.9mg/cm² Al absorber), energy of β-ray (1.6 Mev) calculated from absorption curves (Fig. 3) and energy of γ-ray (1.1 Mev).
Group IIIB and IV obtained from the liver, pyrolic caeca and kidney were supposed to be chiefly consisting of Zn⁶⁵ and Sr⁹⁰-Y⁹⁰ respectively, judging from the decay and energy of β-ray, measured on the unrefined fractions (Fig. 6, 7). Member of Group IIIA were not thoroughly examined in spite of higher activity due to the disturbance of phosphate.
Further confirmation of these nuclides will be dealed in the following papers.
Right : In the previous papers on the radioelements in skipjacks, ¹⁾²⁾ the identification of Cd^113m as a main contaminant and the presence of Zn⁶⁵, Fe⁵⁵ and a trace of Ba¹⁴⁰-La¹⁴⁰ were reported.
The present paper deals with a contaminated big-eyed tuna, Parathunnus mebachi, caught at a station (12°17'N, 167°04'E) in the Pacific Ocean on Oct. 20, 1956. Data on the specimen are given in Table 1 and the radioactivity of tissues and organs is shown in Fig. 1.
The ashes of liver, pyrolic caeca, kidney, red muscle and ordinary muscle were fractionated by the group separation method using carriers and the considerable amount of radioactivity was found in Group II (Table 2).
Radioactive elements contained in Group II were proved to be mostly composed of Cd^113m and Cd^115m by the further fractionation (Fig. 2). The existence of these nuclides was confirmed by the half lives of Cd fractions (57-71 days when estimated directly and 43-44 days when traversed with 263.9mg/cm² Al absorber), energy of β-ray (1.6 Mev) calculated from absorption curves (Fig. 3) and energy of γ-ray (1.1 Mev).
Group IIIB and IV obtained from the liver, pyrolic caeca and kidney were supposed to be chiefly consisting of Zn⁶⁵ and Sr⁹⁰-Y⁹⁰ respectively, judging from the decay and energy of β-ray, measured on the unrefined fractions (Fig. 6, 7). Member of Group IIIA were not thoroughly examined in spite of higher activity due to the disturbance of phosphate.
Further confirmation of these nuclides will be dealed in the following papers.

訂正日: 2008/02/29 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

In the previous papers on the radioelements in skipjacks, ¹⁾²⁾ the identification of Cd^113m as a main contaminant and the presence of Zn⁶⁵, Fe⁵⁵ and a trace of Ba¹⁴⁰-La¹⁴⁰ were reported.
The present paper deals with a contaminated big-eyed tuna, Parathunnus mebachi, caught at a station (12°17'N, 167°04'E) in the Pacific Ocean on Oct. 20, 1956. Data on the specimen are given in Table 1 and the radioactivity of tissues and organs is shown in Fig. 1.
The ashes of liver, pyrolic caeca, kidney, red muscle and ordinary muscle were fractionated by the group separation method using carriers and the considerable amount of radioactivity was found in Group II (Table 2).
Radioactive elements contained in Group II were proved to be mostly composed of Cd^113m and Cd^115m by the further fractionation (Fig. 2). The existence of these nuclides was confirmed by the half lives of Cd fractions (57-71 days when estimated directly and 43-44 days when traversed with 263.9mg/cm² Al absorber), energy of β-ray (1.6 Mev) calculated from absorption curves (Fig. 3) and energy of γ-ray (1.1 Mev).
Group IIIB and IV obtained from the liver, pyrolic caeca and kidney were supposed to be chiefly consisting of Zn⁶⁵ and Sr⁹⁰-Y⁹⁰ respectively, judging from the decay and energy of β-ray, measured on the unrefined fractions (Fig. 6, 7). Member of Group IIIA were not thoroughly examined in spite of higher activity due to the disturbance of phosphate.
Further confirmation of these nuclides will be dealed in the following papers.

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