System preparation and fast neutron spectra measurement in a graphite stack

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Nucl. Technol.; (United States)

OSTI ID:5315148

Tsechanski, A; Shani, G

A 95- X 95- X 95-cm nuclear grade graphite stack was bombarded with a well-collimated monoenergetic 14.75- + or - 0.05-MeV fast neutron beam from a tritium target of a neutron generator. The neutron spectra measured in such types of integral experiments are susceptible to the various neutron interactions (elastic and inelastic scattering by the first few excited levels including anisotropy of angular distributions). This, in turn, facilitates identification and treatment of discrepancies between the experimental and calculational results. The neutron spectra were measured with a 50- X 50-mm NE-213 liquid scintillator using the pulse shape discrimination technique to reject gamma-ray counts. The linearity test of the neutron spectrometer was performed by means of radioactive gamma-ray sources and D(d,n)He/sup 3/ and T(d,n)He/sup 4/ neutrons. Amplification factors (in light units per channel) were achieved with a /sub 11/Na/sup 22/ radioactive source. The spectrometer was checked with the D(d,n)He/sup 3/, T(d,n)He/sup 4/ reactions and an americium-beryllium radioactive neutron source. The measured proton recoil spectra were unfolded in the neutron spectra by the FORIST unfolding code.

• Research Organization: Ben-Gurion University of the Negev, Department of Nuclear Engineering, Beer-Sheva, P.O. Box 653
• OSTI ID: 5315148
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 62:2; ISSN NUTYB
• Country of Publication: United States
• Language: English

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74 ATOMIC AND MOLECULAR PHYSICS
BARYONS
BEAM INJECTION
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