核爆発実験により生じた放射性降下物の定量, (I) γ線スペクトル法による松葉灰中のジルコニウム-95,ニオブ-95の定量

上野 馨

doi:10.3327/jaesj.2.67

核爆発実験により生じた放射性降下物の定量, (I)

γ線スペクトル法による松葉灰中のジルコニウム-95,ニオブ-95の定量

上野馨

著者情報

ジャーナルフリー

1960 年 2 巻 2 号 p. 67-72

DOI https://doi.org/10.3327/jaesj.2.67

詳細

発行日: 1960/02/29 受付日: - J-STAGE公開日: 2009/03/27 受理日: 1959/11/04 早期公開日: - 改訂日: -
訂正情報
訂正日: 2009/03/27 訂正理由: - 訂正箇所: 論文サブタイトル訂正内容: 訂正前 : γ線スペクトル法による松葉灰中のジルコニウム-95,ニオブ-95の定量
訂正後 : γ線スペクトル法による松葉灰中のジルコニウム-95,ニオブ-95の定量

訂正日: 2009/03/27 訂正理由: - 訂正箇所: 論文抄録訂正内容: Wrong : The gamma-ray spectrum emitted by present-day pine leaves reveals the presence of several peaks which do not belong to any naturally occurring nuclide. These peaks come from radioactive fission produts produced from nuclear weapon tests.
The gamma-ray spectra of pine leaves collected in 1958 and 1959 show two remarkable peaks. 0.13 MeV peak is actually a combination of peaks of ¹³¹Ce and ¹⁴⁴Ce-¹⁴⁴Pr, while 0.76 MeV peak is assigned as a peak of ⁹⁵Zr-⁹⁵Nb.
The decay curves of the gamma activity at 0.76 MeV correspond to curves of ⁹⁵Zr-⁹⁵Nb with half-life of 65 days. One gram pine leaves ash contains 26 mμc ⁹⁵Zr-⁹⁵Nb.
Right : The gamma-ray spectrum emitted by present-day pine leaves reveals the presence of several peaks which do not belong to any naturally occurring nuclide. These peaks come from radioactive fission produts produced from nuclear weapon tests.
The gamma-ray spectra of pine leaves collected in 1958 and 1959 show two remarkable peaks. 0.13 MeV peak is actually a combination of peaks of ¹³¹Ce and ¹⁴⁴Ce-¹⁴⁴Pr, while 0.76 MeV peak is assigned as a peak of ⁹⁵Zr-⁹⁵Nb.
The decay curves of the gamma activity at 0.76 MeV correspond to curves of ⁹⁵Zr-⁹⁵Nb with half-life of 65 days. One gram pine leaves ash contains 26 mμc ⁹⁵Zr-⁹⁵Nb.

訂正日: 2009/03/27 訂正理由: - 訂正箇所: 引用文献情報訂正内容: 訂正前 : (2) M. IZAWA, T. NAGAI, T. IWATA, et al.: Jap. J. Med. Sci. Biology, 11, 187 (1958);その他多数.
(3) 原子力研究所保健物理部:“野外管理季報”, No.1-13 (1957-1959).

訂正後 : (2) M. IZAWA, T. NAGAI, T. IWATA, et al.: Jap. J. Med. Sci. Biology, 11, 187 (1958);その他多数.
(3) 原子力研究所保健物理部:“野外管理季報”, No.1-13 (1957-1959).

訂正日: 2009/03/27 訂正理由: - 訂正箇所: PDFファイル訂正内容: -

抄録

The gamma-ray spectrum emitted by present-day pine leaves reveals the presence of several peaks which do not belong to any naturally occurring nuclide. These peaks come from radioactive fission produts produced from nuclear weapon tests.
The gamma-ray spectra of pine leaves collected in 1958 and 1959 show two remarkable peaks. 0.13 MeV peak is actually a combination of peaks of ¹³¹Ce and ¹⁴⁴Ce-¹⁴⁴Pr, while 0.76 MeV peak is assigned as a peak of ⁹⁵Zr-⁹⁵Nb.
The decay curves of the gamma activity at 0.76 MeV correspond to curves of ⁹⁵Zr-⁹⁵Nb with half-life of 65 days. One gram pine leaves ash contains 26 mμc ⁹⁵Zr-⁹⁵Nb.

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