중성자 collimator의 제작 및 Am-Be 중성자 파고스펙트럼 측정 = Construction of Neutron Collimator and Measurement of Pulse Height Spectrum of Am-Be Neutrons

다국어 초록 (Multilingual Abstract)

The neutron collimator, 20cm width, 30cm length, 15cm height and 1cm diameter of hole was constructed by using polyethylene block which includes 15% boric acid. The total cross section of average 7.7MeV neutrons for Al, Cu, Au, Pb samples and the scattering angular distribution of the same energy for Al sample were measured by using 10mCi Am-Be fast neutron source.
The range of average 7.7MeV neutron energy were selected from 6.45 MeV to 8.95MeV at the measured pulse height spectrum.2"Φ×2" NE-213 organic liquid scintillation detector was used on the measurement of neutron flux.
The Pulse Shape Discrimination(P.S.D.) methods were used for the spectra separation of neutron with r-ray at the mixed field.
The results of measurement of total cross section and scattering angular distribution for average 7.7MeV neutrons were compared with other researcher’ and ENDF/B-VI, respectively.