Plastic scintillator beta ray scanner for in-situ discrimination of beta ray and gamma ray radioactivity in soil

Scanner for gamma-ray detectors

The core principle of segmented detectors like AGATA [1], GRETA [2], that will be used in future for 4π gamma detection arrays, is the application of the concept of pulse shape analysis (PSA). The key ingredient for this analysis is a data base containing pulses for all the interaction points inside the segmented detector. A full 3D scanning of the detectors, which experimentally determines pul...

Optical simulation and experimental measurement of gamma ray energy spectrum of plastic scintillators with different sizes

The application of large plastic scintillators is widely increasing in the different areas of industry, medicine and security due to technical and economic advantages. One of the main disadvantages of these detectors is the unknown position of Compton edge at gamma ray spectrum. In this research, GEANT4/GATE code has been used to simulate the gamma ray spectrum for different volumes of large pl...

A Beta-Ray Microscope.

Optimization of measurement counting time in Gamma-ray spectrometry of soil samples

The method of optimal measurement counting time in Gamma spectrometry for soil samples was studied. Gamma spectrometry was done based on minimum detectable activity using the HPGe- p type with efficiency of 30% and FWHM 1.7keV (for 1.33 MeV 60Co). The samples were IAEA-RG Th-1, IAEA-RGU-1 and IAEA-RGK-1 prepared in bottles. The measurements were done for 12 different counting times from 5 min t...

Measurement of Radioactivity Levels and Health Risks in the Surrounding Soil of Shazand Refinery Complex in Arak, Iran, Using Gamma-Ray Spectrometry Method

ntroduction: The purpose of this study was to measure the radioactivity in the agricultural soil of south-east of Shazand Refinery Complex to determine both reliable baseline data on the radiation level and the radiation dose exposure to the farmers and inhabitants of the studied area. Material and Methods: This study was conducted on 21 soil...