MEASUREMENT OF NEUTRON SPECTRA FROM THICK Be TARGET BOMBARDED WITH DEUTERONS

Wang Xiaozhong，

Bai Xixiang，

Li Anli，

Liu Weiping，

Qi Dahai，

Yuan Yuan，

Si Guojian

Nuclear Science and Techniques

Vol.5, No.4

pp.193-201

Published in print 01 Nov 1994

20600

Neutron spectra of Be(d,n) reaction were measured for deuteron energies from 13.5 to 22 MeV by using a stilbene scintillator detector and flight time technique. A special calibration method of neutron detector efficiency for higher energy portion was adopted. The spectral neutron yield per unit beam charge on the Be target at 0° was determined. The fluence-averaged mean neutron energies of the neutron spectra are given as a function of the incident energy for several thresholds. The measured neutron spectra have an almost same shape at different incident deuteron energies. High energy portion (E_n>1.8MeV) and low energy portion (E_n<2.0MeV) of the neutron spectra were separately measured and they were concerned with each other by normalization. The energy range of whole neutron spectra is 0.7 MeV to 30 MeV.

Neutron spectrumBe targetDeuterons

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