Organic scintillators are often chosen as radiation detectors for their fast decay time and their low Z, while inorganic ones are used when high light yields are required. In this paper we show that a para-terphenyl based detector has a blend of properties of the two categories that can be optimal for energy and position measurements of low-energy charged particles. Using 0.1% diphenylbutadiene doped para-terphenyl samples we measured a light attenuation length lambda = 4.73 +/- 0.06 mm, a quenching factor for alpha particles Q(alpha) = (10.7 +/- 0.6), and a rejection power ranging between 3-11% for 660 keV photons, with respect to electrons of the same energy, depending on the signal threshold. A simulation based on FLUKA properly reproduces the experimental data distributions.

Properties of para-Terphenyl as a Detector for alpha, beta and gamma Radiation

Fernando Ferroni;
2014

Abstract

Organic scintillators are often chosen as radiation detectors for their fast decay time and their low Z, while inorganic ones are used when high light yields are required. In this paper we show that a para-terphenyl based detector has a blend of properties of the two categories that can be optimal for energy and position measurements of low-energy charged particles. Using 0.1% diphenylbutadiene doped para-terphenyl samples we measured a light attenuation length lambda = 4.73 +/- 0.06 mm, a quenching factor for alpha particles Q(alpha) = (10.7 +/- 0.6), and a rejection power ranging between 3-11% for 660 keV photons, with respect to electrons of the same energy, depending on the signal threshold. A simulation based on FLUKA properly reproduces the experimental data distributions.
alpha particles; beta rays; biomedical application of radiation; gamma rays; nuclear medicine; para-terphenyl; scintillation detection
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/1025
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