Thermal neutron response of a boron-coated GEM detector via GEANT4 Monte Carlo code. (January 2015)

• Record Type: Journal Article
• Authors: Jamil, M.; Rhee, J.T.; Kim, H.G.; Ahmad, Farzana; Jeon, Y.J.
• Is Part Of: Applied radiation and isotopes. Volume 95(2015:Jan.)
• Page Start: 90
• Page End: 93
• Publication Date: 2015-01
• Subjects: Detector response -- Boron converter -- GEANT4 -- Monte Carlo simulation -- Gas Electron Multiplier (GEM) -- Thermal neutrons; 29.40.Cs -- 29.40.Gx; Radiology -- Periodicals; Radiation -- Industrial applications -- Periodicals; Nuclear chemistry -- Periodicals; Internet resource; Periodical; 660.298
• DOI: 10.1016/j.apradiso.2014.09.023
• Languages: English
• ISSNs: 0969-8043

Abstract

Abstract: In this work, we report the design configuration and the performance of the hybrid Gas Electron Multiplier (GEM) detector. In order to make the detector sensitive to thermal neutrons, the forward electrode of the GEM has been coated with the enriched boron-10 material, which works as a neutron converter. A total of 5×5 cm 2 configuration of GEM has been used for thermal neutron studies. The response of the detector has been estimated via using GEANT4 MC code with two different physics lists. Using the QGSP_BIC_HP physics list, the neutron detection efficiency was determined to be about 3%, while with QGSP_BERT_HP physics list the efficiency was around 2.5%, at the incident thermal neutron energies of 25 meV. The higher response of the detector proves that GEM-coated with boron converter improves the efficiency for thermal neutrons detection. Highlights: The results of boron-coated GEM for thermal neutrons are described. The simulations were performed by GEANT4 MC code. The evaluation was determined by GEANT4 using two physics lists. The response of the detector was taken for E n =25–100 meV.