Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (5): 281-285 doi: 10.13538/j.1001-8042/nst.20.281-285

• NUCLEAR, HEAVY ION AND ATOMIC PHYSICS • Previous Articles     Next Articles

The dependence of cumulative 238U(n,f) fission yield on incident-neutron energy

ZHENG Na1 ZHONG Chunlai1 MA Liyong1 CHEN Zhongjing1 LI Xiangqing1 LIU Tingjin2 CHEN Jinxiang1 FAN Tieshuan1,*   

  1. 1State Key Laboratory of Nuclear Physics and Nuclear Technology and School of Physics, Peking University, Beijing 100871, China 2China Nuclear Data Center, Beijing 102413, China
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ZHENG Na, ZHONG Chunlai, MA Liyong, CHEN Zhongjing. The dependence of cumulative 238U(n,f) fission yield on incident-neutron energy.Nuclear Science and Techniques, 2009, 20(5): 281-285     doi: 10.13538/j.1001-8042/nst.20.281-285


This work is aim at studying the dependence of fission yields on incident neutron energy, so as to produce evaluated yield sets of the energy dependence. Experimental data at different neutron energies for gas fission products 85m,87,88Kr and 138Xe resulting from the 238U(n, f) reaction are processed using codes AVERAGE for weighed average and ZOTT for simultaneous evaluation. Energy dependence of the cumulative fission product yields on the incident neutron is presented. The evaluated curve of product yield is compared with the results calculated by the TALYS-0.64 code. The present evaluation is consistent with other main libraries in error permission. The fit curve of 87,88Kr can be recommended to predict the unmeasured fission yields. Comparisons of the evaluated energy dependence curves with theoretical calculated results show that the predictions using purely theoretical model for the fission process are not sufficiently accurate and reliable for the calculations of the cumulative fission yields for the 238U(n,f).

Key words: Cumulative yield, Evaluation, 238U, Gas nuclides