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Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

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Modelling plastic scintillator response to gamma rays using light transport incorporated FLUKA code.

M Ranjbar Kohan¹, G R Etaati, N Ghal-Eh

¹Physics Department, Tafresh University, Iran.

Applied Radiation and Isotopes : Including Data, Instrumentation and Methods for Use in Agriculture, Industry and Medicine

|February 21, 2012

Summary

This study simulated the gamma ray response of NE102 plastic scintillators using FLUKA and PHOTRACK Monte Carlo codes. Simulation results for scintillators with and without light guides were validated by experimental data.

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Area of Science:

Nuclear Instrumentation
Radiation Detection and Measurement

Background:

Plastic scintillators are widely used for detecting gamma rays.
Accurate simulation of scintillator response is crucial for detector design and analysis.
Understanding light transport within scintillators and light guides is essential.

Purpose of the Study:

To simulate the response function of NE102 plastic scintillator to gamma rays.
To investigate the effect of light guides and surface coverings on scintillator performance.
To validate simulation results with experimental data.

Main Methods:

Utilized a joint FLUKA (gamma transport) and PHOTRACK (scintillation and light transport) Monte Carlo code.
Modeled gamma ray interactions within the NE102 plastic scintillator.
Simulated scintillation photon production and transport through the scintillator and integrated light guides.

Main Results:

The FLUKA+PHOTRACK code successfully simulated the response function of the NE102 plastic scintillator to gamma rays.
The simulation accurately predicted the behavior of scintillators with and without light guides.
The impact of different surface coverings on light guide performance was investigated and validated.

Conclusions:

The combined FLUKA and PHOTRACK Monte Carlo simulation approach provides a reliable method for predicting plastic scintillator response.
Experimental validation confirms the accuracy of the simulation for various configurations, including different light guide surface treatments.
This validated simulation tool can aid in the optimization of plastic scintillator-based radiation detectors.