Abstract
In the past two decades cooperating with Frank Laboratory of Neutron Physics (FLNP), Joint Institute for Nuclear Research (JINR) measurements of (n, α) reaction cross sections for 6Li, 10B, 25Mg, 39K, 40Ca, 54,56,57 Fe, 58Ni, 63Cu, 64,67 Zn, 95Mo, 143Nd and 147,149 Sm nuclei were performed in the MeV neutron energy region based on the 4.5 MV Van de Graaff accelerator at Peking University. In recent years, our measurements were extended in three aspects. Firstly, measurements were expanded from two-body reactions to three-body reactions such as 10B (n, t2 α). Secondly, the neutron energy region was extended from below 8 MeV to 8 - 11 MeV by using the HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE), with which cross sections of 54,56 Fe(n, α)53,51Cr reactions were measured. Thirdly, based on the newly-built China Spallation Neutron Source (CSNS) Back-n WNS (White Neutron Source), differential and angle-integrated cross sections for 6Li(n, t) and 10B(n, α) reactions were measured in the neutron energy region from 1 eV to 3 MeV.
Highlights
Neutron-induced light-charged particle emission reactions [(n, lcp) reactions] are important in nuclear engineering and basic research
In addition to the measurements of the 56,54Fe(n, α)53,51Cr cross sections at the Van de Graaff accelerator at Peking University, neutron energy range was extended to 8 - 11 MeV based on the HI-13 tandem accelerator of China Institute of Atomic Energy (CIAE)
For the 10B(n, α0)7Li and 10B(n, α1)7Li reactions, differential cross sections were measured at 59 neutron energies between 1 eV and 1 MeV
Summary
Neutron-induced light-charged particle emission reactions [(n, lcp) reactions] are important in nuclear engineering (such as the neutron standards, fusion reactors, and accelerator driven system) and basic research (such as the study of nuclear reaction mechanism, and the synthesis of isotopes in early universe). Measurement data are scarce with large uncertainties (except for the results at thermal energies) because the measurements of these reactions are rather difficult. The main challenges for the measurement are as follows: a) the cross sections are often
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