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岩本 信之; 静間 俊行*
EPJ Web of Conferences, 178, p.06004_1 - 06004_3, 2018/05
被引用回数:0 パーセンタイル:0(Optics)Transmutation and reduction of high level radioactive wastes (e.g. minor actinides) produced in nuclear reactors are expected by an accelerator driven system (ADS). Japan Atomic Energy Agency proposed that Pb and Bi are used as a spallation target and coolant. The neutronics design was performed without including Pb, which is a long-lived radioactive nuclide with half-life of 1.710 years and thus has long-lasting radiotoxicity. Pb is produced by the neutron capture reaction on Pb. In order to evaluate the accumulated amount of Pb, the neutron capture cross section of Pb is needed. However, it has not been measured in the keV to MeV neutron energy region. In the present work the calculations of cross sections were performed by the nuclear reaction calculation code, CCONE. Measured photonuclear data of (,) reaction and photoneutron cross sections were used to evaluate photon strength function of Pb. The (,) reaction data used were newly obtained by an experiment at HZDR. The fixed photon strength function was applied to calculate the neutron capture cross sections of Pb. The resulting cross section is smaller than the data of Pb in the relevant energy region.
Dimitriou, P.*; Belgya, T.*; Cho, Y.-S.*; Filipescu, D.*; Firestone, R.*; Goriely, S.*; 岩本 信之; 河野 俊彦*; Kopecky, J.*; Krticka, M.*; et al.
EPJ Web of Conferences, 178, p.06005_1 - 06005_3, 2018/05
被引用回数:2 パーセンタイル:74.73(Optics)測定や既存のデータ評価・編集、また基礎科学や応用への利用に向けた巨大双極子共鳴パラメータ等のテーブル作成を基にした光核反応断面積や光子強度関数の開発について報告する。
Hales, B. P.; 中村 詔司; 木村 敦; 岩本 修
no journal, ,
Nuclear data on the cross-sections of long-lived fission products (LLFPs) is vital for the development of a nuclear transmutation system for the conversion of nuclear waste into stable or more quickly decaying isotopes. As part of the ImPACT Project, research into the cross-sections of the LLFPs Cs and Se is ongoing, using the neutron time-of-flight (nTOF) method at the ANNRI/MLF/J-PARC facility. nTOF experiments have been conducted to measure the cross-section of stable Cs, LLFP Cs, and stable Se. (No experiment for LLFP Se has yet been conducted.) Analysis of experimental data and the cross-section has been derived for stable Cs. Analysis of experimental data is ongoing for LLFP Cs, as well as for stable Se. Details of the above experiments and analysis, as well as details on future plans, will be presented.