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Cross sections for 14 MeV neutron interaction with lutetium isotopes and their theoretical excitation functions

Chinese Physics C 2024年第5期48卷 244-256页

作者：宋月丽周丰群李勇张晓朋姬鹏飞孙小军 School of Electrical and Mechanical Engineering Pingdingshan UniversityPingdingshan 467000China School of Information Engineering Pingdingshan UniversityPingdingshan 467000China

the cross-sections for the 175Lu(n,p)175Yb,175Lu(n,α)172tm,176Lu(n,α)173tm,175Lu(n,2n)174mLu,and 175Lu(n,2n)174gLu reactions at 13.57,14.0314.62,and 14.86 MeV neutron energies were measured using an activation technique.the theoretical excitation functions of these reactions were calculated using the talys-1.95 code.the reaction cross-section data experimentally obtained were analyzed and compared with experimental data reported in the literature,data from five major evaluated nuclear data libraries of IAEA,and theoretical values based on talys-1.95.the data obtained at some neutron energies agree with some of the data reported in the literature and theoretical values based on talys-1.95.the consistency of the theoretical curves of excitation functions based on talys-1.95 with the data obtained in this study and those reported in the literature is higher than that of the evaluation curves of excitation functions for the 175Lu(n,p)175Yb,175Lu(n,α)172 tm,and 176Lu(n,α)173tm reactions.this study is helpful because it provides new evaluated reaction cross-section data on lutetium(which is a fusion reactor material),improves the quality of neutron-induced reaction cross section data libraries,and advances the research on related applications.

关键词： nuclear reaction cross sections of lutetium isotopes activation technique d-t neutron theoretical calculations talys-1.95

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Method for measuring promptγ-rays generated by d-t neutrons bombarding a depleted uranium spherical shell

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Chinese Physics C 2016年第1期40卷 37-46页

作者：秦建国赖财锋蒋励刘荣张信威叶邦角朱通华 department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry CAEPP.O.Box 213Mianyang 621900China Graduate School China Academy of Engineering PhysicsMianyang 621900China Institute of Applied Physics and Computational Mathematics P.O.Box 8009Beijing 100088China

the prompt t-ray spectrum from depleted uranium （dU） spherical shells induced by 14 MeV d-t neutrons is measured. Monte Carlo （MC） simulation gives the largest prompt 2/ flux with the optimal thickness of the dU spherical shells 3-5 cm and the optimal frequency of neutron pulse 1 MHz. the method of time of flight and pulse shape coincidence with energy （dC-tOF） is proposed, and the subtraction of the background y-rays discussed in detail. the electron recoil spectrum and time spectrum of the prompt γ-rays are obtained based on a 2＇＇ × 2＇＇ BC501A liquid scintillator detector. the energy spectrum and time spectrum of prompt γ-rays are obtained based on an iterative unfolding method that can remove the influence of γ-rays response matrix and pulsed neutron shape. the measured time spectrum and the calculated results are roughly consistent with each other. Experimental prompt γ-ray spectrum in the 0.4-3 MeV energy region agrees well with MC simulation based on the ENdF/BVI.5 library, and the discrepancies for the integral quantities ofγ-rays of energy 0.4-1 MeV and 1 3 MeV are 9.2% and 1.1%, respectively.

关键词： d-t neutron depleted uranium prompt γ-ray delayed γ-ray time of flight

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