 BackResearch Article ScienceAsia 9 (1983): 129-142 |doi: 10.2306/scienceasia1513-1874.1983.09.129
SPECTRUM OF COINCIDENT NEUTRONS FROM Am-Be NEUTRON SOURCE
T. VILAITHONG, N. CHIRAPATPIMOL, V. TEEYASOONTRANON and S. SINGKARATABSTRACT: A measurement was made of the energy spectrum of neutrons above 1 MeV emitted in coincidence with gamma radiations from the Am-Be source with an energy resolution of about 5 percent using an associated gamma-ray lime-of-flight spectrometer. The measured spectrum displays peaks at 3.2 and 4.8 MeV and decreases smoothly from 5 MeV to zero above 6.5 Mev. The data are compared with previous measurements and with the predictions of nuclear reaction calculations. The number of neutrons emitted at various energies are consistent with the mechanisms of producing neutrons by populating the first excited state of 12C nucleus. Department of Physics, Faculty of Science, Chiang Mai University, Chiang Mai 5002, Thailand. Received 19 April 1983
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