Experimental and GEANT4 simulated FEPE of NaI(Tl) detector for linear sources

被引：0
作者：
Mansoor, Shahid [1 ,2 ]
Malik, Azhar Hussain [1 ]
Satti, Khizar Hayat [2 ,3 ]
Ijaz, Misbah [4 ]
Siddique, Muhammad Tariq [3 ]
机构：
[1] Pakistan Inst Engn & Appl Sci PIEAS, Dept Nucl Engn DNE, Islamabad, Pakistan
[2] Pakistan Inst Nucl Sci & Technol PINSTECH, Hlth Phys Div HPD, PO Nilore, Islamabad, Pakistan
[3] Pakistan Inst Engn & Appl Sci PIEAS, Dept Phys & Appl Math DPAM, Islamabad, Pakistan
[4] Quaid I Azam Univ, Dept Math, Islamabad, Pakistan
来源：
BIOMEDICAL PHYSICS & ENGINEERING EXPRESS | 2025年 / 11卷 / 02期
关键词：
NaI(Tl) scintillation detector; Tc-99m line source; full energy peak efficiency (FEPE); Monte Carlo (MC) GEANT4 simulations; MONTE-CARLO-SIMULATION; CIRCULAR DETECTOR; NAI DETECTOR; EFFICIENCY; MCNP;
D O I：
10.1088/2057-1976/adaec8
中图分类号：
R8 [特种医学]; R445 [影像诊断学];
学科分类号：
1002 ; 100207 ; 1009 ;
摘要：
The current study investigated the geometry, design and solid angle impacts on full energy peak efficiency (FEPE) of NaI(Tl) detectors for a line source. A line source is fabricated using Tc-99m solution filled in a borosilicate glass tube of inner diameter 3 mm, tube wall thickness 2.5 mm and length 12.7 cm. The FEPE is measured for the fabricated linear source using 2 '' x2 '' NaI(Tl) cylindrical detector at various source-detector distances. The experimental setup is simulated in GEANT4 and the computed FEPE values are compared with experimental values. The absolute error of 5% is observed between computed and measured FEPE values. Utilizing the advantages of MC simulations, the impact of numerous source parameters such as source length, diameter, source-detector distance, glass tube thickness and lead shield effects on FEPE are investigated to optimize the fabrication process of linear sources. A case study for current investigation has been analyzed by considering absolute FEPE of the NaI(Tl) system for a syringe filled with radioactive solution. This study provides an insight for the fabrication of standard linear sources by analyzing different source parameters and hence, may serve as a guideline to prepare standard linear sources for the calibration of radiation detectors.
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页数：9
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