TY - JOUR
T1 - Silicon detector characterisation for monoenergetic neutron measurements using proton-recoil telescopes
AU - Park, Hyeoung Woo
AU - Kang, Sinchul
AU - Yoon, Young Soo
AU - Park, Hyeonseo
AU - Kim, Jungho
AU - Kim, Joong Hyun
AU - Jegal, Jin
AU - Jeong, Dong Woo
AU - Kim, Hongjoo
N1 - Publisher Copyright:
© 2024 Elsevier B.V.
PY - 2024/8
Y1 - 2024/8
N2 - Precise absolute-neutron-flux measurements are critical in numerous applications, including cross-sectional measurements of neutron-induced reactions, characterisation of neutron beams, and dosimetric surveys. The cross-section of elastic scattering between neutrons and protons is a widely recognised indicator for accurate absolute-neutron-flux measurements, and elastically scattered protons can be detected using a proton-recoil telescope (PRT) equipped with silicon detectors. The present study was focused on the optimisation and characterisation of a PRT for establishing a standard monoenergetic neutron field at the Korea Research Institute of Standards and Science (KRISS) in Korea. To improve the reliability of the PRT characterisation results, its energy calibration was performed using a 20-MeV proton beam delivered by a cyclotron, instead of conventional α-radiation sources. The irradiation experiment was conducted using a proton beam with an energy of 14.8 MeV; this energy corresponds to the maximum energy transferred from a neutron, emitted from deuterium–tritium fusion, to an elastically recoiled proton during an elastic collision. In addition to energy calibration, the coincidence time resolution of the KRISS-PRT silicon detector under proton beam irradiation was confirmed to be 15.5 ns at 1σ, which could not be attained using conventional α-particle sources.
AB - Precise absolute-neutron-flux measurements are critical in numerous applications, including cross-sectional measurements of neutron-induced reactions, characterisation of neutron beams, and dosimetric surveys. The cross-section of elastic scattering between neutrons and protons is a widely recognised indicator for accurate absolute-neutron-flux measurements, and elastically scattered protons can be detected using a proton-recoil telescope (PRT) equipped with silicon detectors. The present study was focused on the optimisation and characterisation of a PRT for establishing a standard monoenergetic neutron field at the Korea Research Institute of Standards and Science (KRISS) in Korea. To improve the reliability of the PRT characterisation results, its energy calibration was performed using a 20-MeV proton beam delivered by a cyclotron, instead of conventional α-radiation sources. The irradiation experiment was conducted using a proton beam with an energy of 14.8 MeV; this energy corresponds to the maximum energy transferred from a neutron, emitted from deuterium–tritium fusion, to an elastically recoiled proton during an elastic collision. In addition to energy calibration, the coincidence time resolution of the KRISS-PRT silicon detector under proton beam irradiation was confirmed to be 15.5 ns at 1σ, which could not be attained using conventional α-particle sources.
KW - Monoenergetic neutron
KW - Proton beams
KW - Proton-recoil telescope
KW - Silicon detector
UR - http://www.scopus.com/inward/record.url?scp=85196951681&partnerID=8YFLogxK
U2 - 10.1016/j.nima.2024.169554
DO - 10.1016/j.nima.2024.169554
M3 - Article
AN - SCOPUS:85196951681
SN - 0168-9002
VL - 1065
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 169554
ER -