Speaker
Dr
Hyunduk Kim
(KAIST)
Description
Most detection systems for radiation detection are basically made up of scintillator and photo-sensor, and the most popular instrument for collecting a light from a scintillator in the field of the nuclear experiments is PMT(Photomultiplier Tube). However, silicon-based photo-sensors as like Photodiode and APD(Avalanche photodiode) have been developed so as to replace it. One of promising replacements in a spectroscopy is SiPM(Silicon photomultiplier). For measurements of the characteristics of neutron spectrometer, a scintillator for the neutron detection was chosen among commercially available scintillators.
In this study, a Stilbene and a BC501A are selected as neutron detecting material because they have a good performance of pulse-shape discrimination under PMT-based measurements.
The performance of decay time is measured against neutrons using SiPM. Not only we tested the performance of pulse-shape discrimination of the neutron and gamma-ray with SiPM using a 252Cf neutron source at a room temperature, but also we measured the characteristics of it at sub-zero temperatures. Gain, decay time and pulse shape discrimination of SiPM are compared with that of PMTs or APDs. This study is supported by Ministry of Knowledge Economy through KEIT(10030104).
Author
Dr
Hyunduk Kim
(KAIST)
Co-authors
Prof.
Gyuseong Cho
(KAIST)
Prof.
Hongjoo Kim
(Kyungpook National University)
