Yf. Yen et al., DETERMINATION OF THE GAMMA-RAY BACKGROUND IN A PULSED EPITHERMAL NEUTRON BEAM, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 397(2-3), 1997, pp. 365-370
The gamma-ray background in the pulsed neutron beam at the Los Alamos
Neutron Scattering Center was measured with an array of B-10-loaded li
quid scintillators. With the method employed the gamma-ray contributio
n in the neutron beam can be determined without knowledge of the energ
y spectrum of the gamma-rays. The ratio of gamma-ray to neutron intens
ities in the beam was determined during the time interval following th
e beam burst that corresponds to neutron energies from E-n = 1 to 340
eV. The gamma-ray content in the beam ranges from 2% at 1 eV to 10% at
340 eV.