Preparation of a liquid nitrogen target for the high efficient capture γ-ray measurement
for the 14N(n,γ)15N reaction.
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For determination of γ-ray intensities up to 11MeV in the 14N(n,γ)15N reaction, we have developed a liquid nitrogen target that is useful for improvement of statistics and reduction of the background from the product of 2H via 1H(n,γ) reaction. The ratios of the relative uncertainties for the melamine, which has been widely used, to that for the liquid nitrogen was improved by a factor of 2 above 2 MeV and a factor of 3〜6 below 2 MeV. |
捕獲γ線 (Capture gamma ray)：中性子を吸収した核が励起状態から基底状態に崩壊する時に放出するγ線
Measurment of activation cross sections with d-D neutrons in the energy range of 2.0-3.2 MeV.
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Activation cross sections for six (n,p) reactions were measured in the energy range between 2.0 and 3.2 MeV. The measured target isotopes were 27Al, 51V, 61Ni, 65Cu, 69Ga, and 92Mo. The cross sections for 61Ni, 69Ga and 92Mo were obtained at the first time. |
中性子放射化断面積 (Neutron cross section)：中性子と標的核とが核反応を起こす確率