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:6449785

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
• OSTI ID: 6449785
• Journal Information: Nucl. Technol.; (United States), Journal Name: Nucl. Technol.; (United States) Vol. 62:2; ISSN NUTYB
• Country of Publication: United States
• Language: English

Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
654003 -- Radiation & Shielding Physics-- Neutron Interactions with Matter
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BARYONS
BEAMS
CARBON
DATA PROCESSING
ELEMENTAL MINERALS
ELEMENTARY PARTICLES
ELEMENTS
FAST NEUTRONS
FERMIONS
GRAPHITE
HADRONS
MEASURING INSTRUMENTS
MEASURING METHODS
MINERALS
NEUTRON BEAMS
NEUTRON SPECTRA
NEUTRON SPECTROMETERS
NEUTRON SPECTROSCOPY
NEUTRONS
NONMETALS
NUCLEON BEAMS
NUCLEONS
PARTICLE BEAMS
PROCESSING
SCATTERING
SLOWING-DOWN
SPECTRA
SPECTRA UNFOLDING
SPECTROMETERS
SPECTROSCOPY
TARGETS