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2012 ◽  
Vol 27 (1) ◽  
pp. 20-27
Author(s):  
Abdulkadir Aydarous ◽  
Anthony Waker

Plastic scintillators, due to their favorable characteristics compared with other dosimetry techniques, were used as detectors to estimate dose distributions in high gradient dose fields. In this study, a thin plastic scintillator (type BC-408) was coupled to a photomultiplier tube and multichannel analyzer as a technique for real-time dose measurements. The well-defined beta, gamma, and beta-gamma emitters (137Cs, 133Ba, 22Na, 109Cd, 55Fe, and 241Am) have enabled parallel depth dose measurements with Monte-Carlo calculations to be critically compared. The measurements of doses were made for depths range of 0.1 mm to 5 mm. The MCNP dose results were comparable with the plastic scintillator detector and can be used to approximately estimate the dose rate values from mixed electron-photon fields. The minimum dose rate that can be measured by the plastic scintillator system was ~2 ?Gy/h and was for 109Cd source of activity 222 Bq.


2007 ◽  
Vol 65 (5) ◽  
pp. 512-516 ◽  
Author(s):  
D. Gupta ◽  
J.M. Chatterjee ◽  
R. Ghosh ◽  
A.K. Mitra ◽  
S. Roy ◽  
...  

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