中法核工程与技术学院第95期学术午餐会

中法核工程与技术学院第95期学术午餐会

95^th Academic Lunch Seminar of Sino-French Institute of Nuclear Engineering and Technology

Topic: 56,54Fe(n, α)53,51Cr Cross Sections in the MeV Region

Speaker: BAI Huaiyong

Time: 12:40 – 14:00, Friday November 16, 2018

Venue: F309 in the teaching building, Zhuhai Campus, SYSU

Organizer: Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University

Language: English

Abstract:

56,54Fe(n, α)53,51Cr cross sections were measured at three neutron energy points in 5–11 MeV region using three accelerator neutron sources, a twin gridded ionization chamber, and highly enriched 56Fe and 54Fe foil samples. The 238U(n, f) reaction was used to monitor the neutron fluence, and the interferences from low energy neutrons were corrected according to the neutron energy spectra obtained through unfolding the pulse height spectra measured by a liquid scintillator. Both the measured cross sections show a “shoulder” structure in 8–11 MeV region which may be caused by the level structure of the residual nuclei. The present work help much better to constrain the 56,54Fe(n, α)53,51Cr excitation functions in the MeV region where their neutron energy dependences are significant, while the related measurements are blank or scarce and the differences among existing measurements and evaluations are significant.

About the speaker:

BAI Huaiyong, doctor of nuclear technology and application at Peking University. His main research is radiometric technology, data analysis, signal acquisition and analyse.