Record Details

Development and characterisation of a silicon PIN diode array based highly sensitive portable continuous radon monitor

DSpace at IIT Bombay

View Archive Info
 
 
Field Value
 
Title Development and characterisation of a silicon PIN diode array based highly sensitive portable continuous radon monitor
 
Creator ASHOKKUMAR, P
SAHOO, BK
RAMAN, A
MAYYA, YS
 
Subject DECAY PRODUCTS
DETECTOR
CELL
PHOTODIODE
HUMIDITY
THORON
 
Description This paper discusses the development and characterisation of a portable and highly sensitive continuous radon monitor (CRM) based on an array of in-house developed silicon PIN diode detectors. The development of this system was initiated in view of the limitations of the available similar radon measurement systems with regards to low sensitivity. The system utilises a hemispherical metal chamber (1 L capacity) for active air sampling. A quantitative estimation of radon concentration is carried out through alpha spectroscopy of electro-deposited Rn-222 decay products on the detector surface. The system was successfully tested and characterised in laboratory conditions. The characterisation experiments included optimisation of sensitivity, calibration with respect to linearity and a study of the influence of humidity on its performance. The novel PIN diode array design yields a high sensitivity of 1.76 +/- 0.003 counts h(-1)/Bq m(-3)) at a relative humidity level of 10% in the sampled air, which is more than two times as high as that reported for similar commercial systems. This instrument displayed a minimum detectable activity level of 0.80 Bq m(-3).
 
Publisher IOP PUBLISHING LTD
 
Date 2014-12-28T11:32:57Z
2014-12-28T11:32:57Z
2014
 
Type Article
 
Identifier JOURNAL OF RADIOLOGICAL PROTECTION, 34(1)149-160
0952-4746
1361-6498
http://dx.doi.org/10.1088/0952-4746/34/1/149
http://dspace.library.iitb.ac.in/jspui/handle/100/16368
 
Language English