Reactor neutron capture cross section of 60.3-day 124Sb.
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概要
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The radioactive nuclides <SUP>124</SUP>Sb (<I>T</I><SUB>1/2</SUB>=60.3 d) and <SUP>125</SUP>Sb (<I>T</I><SUB>1/2</SUB>= 2.77 yr) were produced from natural antimony by JRR-3 reactor irradiation of 283.5 h through the single and double capture processes. After cooling of 3.50 yr, the γ-ray spectrum of the antimony sample irradiated was measured by a 50 cc coaxial type Ge(Li) detector, and the photo-peak yield ratio of <SUP>125</SUP>Sb (<I>E</I><SUB>γ</SUB>=428 keV) to <SUP>124</SUP>Sb (<I>E</I><SUB>γ</SUB>=1.691 MeV) was obtained. By using a relation between this photo-peak yield ratio and the <SUP>124</SUP>Sb(<I>n</I>, γ)<SUP>125</SUP>Sb cross section, the reactor neutron capture cross section of 60.3-day <SUP>124</SUP>Sb was obtained as 17.4<SUP>+2.8</SUP><SUB>-2.5</SUB> b. The thermal neutron flux at the position of antimony sample irradiated was estimated as (4.92±0.38) × 10<SUP>12</SUP><I>n</I>/cm<SUP>2</SUP>•s by measuring the 1.333-MeV photo-peak yield of <SUP>60</SUP>Co, which was activated by reactor irradiation of cobalt impurity contained in the antimony sample.
- 一般社団法人 日本原子力学会の論文
著者
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Nishimura Kazuaki
Japan Atomic Energy Research Institute
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OGAWA Sigeru
Japan Atomic Energy Research Institute
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TSUTIYA Toshio
Japan Atomic Energy Research Institute
関連論文
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- Reactor neutron capture cross section of 60.3-day 124Sb.
- JAERI nuclear engineering school and technology transfer.