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Hanno Perrey

assistant director of undergraduate education

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GEANT4-based calibration of an organic liquid scintillator

Author

  • Nicholai Mauritzson
  • KG Fissum
  • Hanno Perrey
  • John Annand
  • Robert Frost
  • Richard Hall-Wilton
  • R Jebali
  • Kalliopi Kanaki
  • Vendula Maulerova-Subert
  • Francesco Messi
  • Emil Rofors
Show all

Summary, in English

A light-yield calibration of an NE 213A organic liquid scintillator detector has been performed using bothmonoenergetic and polyenergetic gamma-ray sources. Scintillation light was detected in a photomultipliertube, and the corresponding pulses were subjected to waveform digitization on an event-by-event basis. Theresulting Compton edges have been analyzed using a GEANT4 simulation of the detector which models boththe interactions of the ionizing radiation as well as the transport of scintillation photons. The simulation is calibrated and also compared to well-established prescriptions used to determine the Compton edges,resulting ultimately in light-yield calibration functions. In the process, the simulation-based method produced information on the gain and intrinsic pulse-height resolution of the detector. It also facilitated a previously inaccessible understanding of the systematic uncertainties associated with the calibration of the scintillation-light yield. The simulation-based method was also compared to well-established numerical prescriptions for locating the Compton edges. Ultimately, the simulation predicted as much as 17% lower light-yield calibrations than the prescriptions. These calibrations indicate that approximately 35% of the scintillation light associated with a given gamma-ray reaches the photocathode. It is remarkable how well two 50 year old prescriptions for calibrating scintillation-light yield in organic scintillators have stood the test of time.

Department/s

  • Nuclear physics

Publishing year

2022-01-21

Language

English

Publication/Series

Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

Volume

1023

Document type

Journal article

Publisher

Elsevier

Topic

  • Physical Sciences
  • Accelerator Physics and Instrumentation

Keywords

  • cintillation light-yield calibration
  • Organic liquid scintillator
  • NE 213A
  • Gamma-rays
  • Compton edge
  • GEANT4

Status

Published

ISBN/ISSN/Other

  • ISSN: 0168-9002