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이기수,이경세,Benard Mulilo,홍병식 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.62 No.9
A neutron detector array will be essential for the study of the nuclear symmetry energy in the large-acceptance multipurpose spectrometer (LAMPS) at the planned rare-isotope beam facility RAON in Korea. We have built the prototype neutron detector for LAMPS and examined its performance by using radiation sources. For data taking, we tested the voltage-threshold discriminator (VTD) and the constant-fraction discriminator (CFD) modules for the pulse process. The intrinsic time resolution of the prototype detector is estimated to be 723 ps for VTD and 488 ps for CFD. The fission neutrons and gammas emitted from 252Cf can be clearly separated in the time distribution. We reconstruct the energy spectrum of the spontaneous fission neutrons from 252Cf, which can be described well by using the empirical Watt spectrum.
Performance of prototype neutron detectors for Large Acceptance Multi-Purpose Spectrometer at RAON
Shim, Hyunha,Lee, Jong-Won,Hong, Byungsik,Ahn, Jung Keun,Bak, Gyeonghwan,Jo, Jamin,Kim, Minho,Kim, Young Jin,Kim, Young Jun,Lee, Hanseul,Lee, Hyo Sang,Lee, Kyong Sei,Mulilo, Benard,Moon, Dong Ho,Ryu, Elsevier 2019 Nuclear Instruments & Methods in Physics Research. Vol.927 No.-
<P><B>Abstract</B></P> <P>The performance of the prototype modules of neutron detectors for the Large Acceptance Multi-Purpose Spectrometer (LAMPS) was investigated, using cosmic muons and neutron beams at 65 and 392 MeV, provided by the Research Center for Nuclear Physics (RCNP). The timing and position resolutions were estimated using cosmic muons as 309 ps and 4.8 cm, respectively. The energy resolution depended on the incident energy of neutrons: 1.3% at 65 MeV and 3.1% at 392 MeV. The neutron-detection efficiency also showed weak energy dependence as it decreased from (9.0 ± 1.6)% at 65 MeV to (6.3 ± 1.0)% at 392 MeV.</P>