https://doi.org/10.1140/epja/i2017-12434-y
Regular Article - Experimental Physics
Measurement of differential and double-differential neutron emission cross-sections for 9Be at 21.94 MeV neutrons
1
School of Nuclear Science and Technology, Lanzhou University, 730000, Lanzhou, China
2
Institute of Modern Physics, Chinese Academy of Sciences, 730000, Lanzhou, China
3
Key Laboratory of Nuclear Data, China Institute of Atomic Energy, 102413, Beijing, China
4
Chinese Academy of Engineering Physics, 621908, Mianyang, Sichuan, China
5
Institute of High Energy Physics, Chinese Academy of Sciences, 100049, Beijing, China
6
Engineering Research Center for Neutron Application, Ministry of Education, Lanzhou University, 730000, Lanzhou, China
* e-mail: zeyao@lzu.edu.cn
Received:
6
June
2017
Accepted:
20
November
2017
Published online:
14
December
2017
The secondary neutron emission differential and double-differential cross sections (DX and DDXs) of n + 9Be have been measured at the neutron energy of 21.94MeV using the multi-detector fast neutron time-of-flight (TOF) spectrometer. The data was derived by comparing the measured TOF spectra with detailed Monte Carlo simulation, and corrected with n-p scattering cross section. Meanwhile, theoretical calculations based on the Hauser-Feshbach and exciton model have been performed to compare with experimental data. Measured differential cross sections were also compared with other measurements. It was found that the experimental results were in agreement with other measurements and theoretical calculations, while discrepancies were also present in the whole energy region and at some angles.
© SIF, Springer-Verlag GmbH Germany, part of Springer Nature, 2017
