Measurements of Neutron Emission Spectra for Neutron Induced Reactions on <SUP>9</SUP>Be and <SUP>6,7</SUP>Li

RUAN Xi-Chao; ZHOU Zu-Ying; CHEN Guo-Chang; QI Bu-Jia; LI Xia; HUANG Han-Xiong; ZHONG Qi-Ping; TANG Hong-Qing; JIANG Jing; XIN Biao; BAO Jie; CHEN Lin; ZHANG Jing-Shang

Chinese Physics C> 2007, Vol. 31> Issue(5) : 442-447

Measurements of Neutron Emission Spectra for Neutron Induced Reactions on ⁹Be and ^6,7Li

China Institute of Atomic Energy, Beijing 102413, China

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The neutron emission double-differential cross sections(DDXs) of n+⁹Be and ^6,7Li were measured at incident neutron energies of 8.17 and 10.27MeV. At 10.27MeV, the influence of breakup source neutrons from D(d, np) reactions was eliminated by using the combination of abnormal and normal fast neutron TOF spectrometers. The measured TOF spectra were analyzed by detailed Monte-Carlo simulation and the DDXs were determined by comparing the measured TOF spectra with simulated ones. The cross sections were normalized to n-p(normal geometry measurement) or n-C(abnormal geometry measurement) scattering measurement. The measured results were compared with the evaluations and the other measurements. A theoretical model based on the Hauser-Feshbach and exciton model for light nuclei was used to describe the double-differential cross sections of n+^6,7Li. Good agreement between theoretical calculation and measurement has been obtained.

References

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RUAN Xi-Chao, ZHOU Zu-Ying, CHEN Guo-Chang, QI Bu-Jia, LI Xia, HUANG Han-Xiong, ZHONG Qi-Ping, TANG Hong-Qing, JIANG Jing, XIN Biao, BAO Jie, CHEN Lin and ZHANG Jing-Shang. Measurements of Neutron Emission Spectra for Neutron Induced Reactions on ⁹Be and ^6,7Li[J]. Chinese Physics C, 2007, 31(5): 442-447.

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Received: 2006-08-11
Revised: 2006-10-15

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Measurements of Neutron Emission Spectra for Neutron Induced Reactions on ⁹Be and ^6,7Li

Corresponding author: RUAN Xi-Chao,

China Institute of Atomic Energy, Beijing 102413, China

Received Date: 2006-08-11

Accepted Date: 2006-10-15

Available Online: 2007-05-05

Abstract: The neutron emission double-differential cross sections(DDXs) of n+⁹Be and ^6,7Li were measured at incident neutron energies of 8.17 and 10.27MeV. At 10.27MeV, the influence of breakup source neutrons from D(d, np) reactions was eliminated by using the combination of abnormal and normal fast neutron TOF spectrometers. The measured TOF spectra were analyzed by detailed Monte-Carlo simulation and the DDXs were determined by comparing the measured TOF spectra with simulated ones. The cross sections were normalized to n-p(normal geometry measurement) or n-C(abnormal geometry measurement) scattering measurement. The measured results were compared with the evaluations and the other measurements. A theoretical model based on the Hauser-Feshbach and exciton model for light nuclei was used to describe the double-differential cross sections of n+^6,7Li. Good agreement between theoretical calculation and measurement has been obtained.

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Measurements of Neutron Emission Spectra for Neutron Induced Reactions on ⁹Be and ^6,7Li

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Measurements of Neutron Emission Spectra for Neutron Induced Reactions on 9Be and 6,7Li

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Measurements of Neutron Emission Spectra for Neutron Induced Reactions on ⁹Be and ^6,7Li

Measurements of Neutron Emission Spectra for Neutron Induced Reactions on ⁹Be and ^6,7Li