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萩原 開人*; 矢野 孝臣*; Das, P. K.*; Lorenz, S.*; 王 岩*; 作田 誠*; 木村 敦; 中村 詔司; 岩本 信之; 原田 秀郎; et al.
Progress of Theoretical and Experimental Physics (Internet), 2019(2), p.023D01_1 - 023D01_26, 2019/02
被引用回数:32 パーセンタイル:87.57(Physics, Multidisciplinary)We have measured the -ray energy spectrum from the thermal neutron capture, , on an enriched Gd target () in the energy range from 0.11 MeV up to about 8 MeV. The target was placed inside the germanium spectrometer of the ANNRI detector at J-PARC and exposed to a neutron beam from the Japan Spallation Neutron Source (JSNS). Radioactive sources (Co, Cs, and Eu) and the reaction were used to determine the spectrometer's detection efficiency for rays at energies from 0.3 to 8.5 MeV. Using a Geant4-based Monte Carlo simulation of the detector and based on our data, we have developed a model to describe the -ray spectrum from the thermal reaction. While we include the strength information of 15 prominent peaks above 5 MeV and associated peaks below 1.6 MeV from our data directly into the model, we rely on the theoretical inputs of nuclear level density and the photon strength function of Gd to describe the continuum -ray spectrum from the reaction. The results of the comparison between the observed -ray spectra from the reaction and the model are reported in detail.
中島 豊; 坪根 泉*; 水本 元治; 古田 悠*; 大久保 收二; 杉本 昌義; 河原崎 雄紀
Annals of Nuclear Energy, 16(11), p.589 - 597, 1989/00
被引用回数:8 パーセンタイル:67.25(Nuclear Science & Technology)GdとGdの中性子捕獲断面積を原研リニアックを用いて1.1から235keVまで測定した。測定結果を他の測定値およびJENDL-2と比較した。測定した中性子捕獲断面積を最小自乗法により解析し、次の平均共鳴パラメータを得た。Gdに対しては、S波中性強度関数=(3.000.28)10、P波中性子強度関数=(3.71.1)10、S波放射捕獲幅=11929eV、P波放射捕獲幅=14060eVであり、Gdに対しては、S波中性子強度関数=(2.230.57)10、P波中性子強度関数=(2.20.7)10、S波放射捕獲幅=11528eV、P波放射捕獲幅=12925eVである。