The effect of radiation source distance to the scintillation detector based on Monte Carlo simulation. (March 2020)

• Record Type: Journal Article
• Authors: Junios, ; Haryanto, Freddy; Su'ud, Zaki; Novitrian,
• Is Part Of: Journal of physics. Volume 1493(2020)
• Publication Date: 2020-03
• Subjects: radiation source distance -- Monte Carlo simulation; Physics -- Congresses; 530.5
• DOI: 10.1088/1742-6596/1493/1/012012
• Languages: English
• ISSNs: 1742-6588

Abstract

Abstract: The variation of the source distance to the detector causes a change in the count value. The aims were to study the effect of source distance variation to a detector. This research simulated count value detected by the scintillator detector with a variety of distance to the radiation source using EGSNRC tutor.3 Monte Carlo. The Energy of 60 Co radiation source was modeled monoenergetic, so energies 1.17 MeV and 1.33 MeV are handled separately. The geometry of this source was assumed to be the point source. The simulated medium was divided into three regions, vacuum, scintillation detector, and vacuum. The range of detector distance variated from 5 to 9.5 cm from the source and used 10 9 particles. The cut-off Energy for electrons 0.512 MeV and photons 0.01 MeV. The output score energy deposited in the scintillation detector. The count value for each region was analyzed and compared. The changes of distance from 5 cm to (5.5, 7.5, 8.5, and 9.5) caused an increase of a count in the Compton area of 5.1%, 27.1%, 35.9%, and 44.6%, respectively. While in the photopeak area there was a decrease of 2.7%, 12.2%, 15.8%, and 19.0%, respectively. There was a change in count value on the distance variation caused by the quantity of source changed. The detector captures less quantity in the photopeak area.