Measurement of the response function of a custom plastic scintillator using monoenergetic neutron and proton sources
Résumé
An experimental study was carried out to determine the light output function of the protons deposited energy in a custom triple discriminating (thermal neutrons/fast neutrons/gamma rays) plastic scintillator. Two response functions of the plastic scintillator were measured and compared using monoenergetic sources of either neutrons or protons. The response function to neutrons was measured at the IRSN Amande facility in CEA Cadarache using the monoenergetic neutron generator. The response matrix was based on six incident neutron energies that ranged from 953 keV to 14.8 MeV. The low-energy threshold for detecting neutrons is evaluated at around 1 MeV. The second response function was measured utilizing the Cyrcé cyclotron at IPHC located in Strasbourg. The response matrix was obtained based on six incident proton energies ranging from 5.9 to 19.97 MeV. The response function measured using monoenergetic neutrons has a nearly rectangular shape that extends from the light output of the low-energy discrimination threshold to the light output of the full incident neutron energy. The pulse height spectra acquired with monoenergetic protons exhibit a Gaussian shape, where the average value corresponds to the light output of the incident protons’ energy. The exponential curve used to fit the light output data acquired from the monoenergetic neutron field generator aligns well with the light output data obtained from the monoenergetic proton beam.
Mots clés
instrumentation
nuclear instrumentation
X-rays
ionizing radiation
radioactivity
proton deposited energy
protons
Neutron-gamma discrimination
Electronic architecture
thermal neutrons
fast neutrons
Gamma-rays
plastic scintillator
neutrons
response function
signal processing
Amande facility
neutron generator
detector
Cyrcé cyclotron
low-energy discrimination threshold
spectrum analysis
Energy measurement
Calibration
Neutron Source
Proton Source
Monoenergetic Proton
Monoenergetic Neutrons
Energy Range
Incident Energy
Light Output
Proton Beam
Light Data
Proton Energy
Neutron Energy
Incident Neutron
Standard Curve
Collimator
Measured Spectra
Energy Spectrum
Light Response
Fabric Thickness
Silicon Photomultiplier
Energy Deposition
Calibration Points
Neutron Capture
Energy Resolution
Neutron Detection
Aluminum Layer
Monoenergetic neutron source
monoenergetic proton beam
proton light output
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