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A comparative study between the dynamic method and passive can technique of radon exhalation measurements from samples

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Title A comparative study between the dynamic method and passive can technique of radon exhalation measurements from samples
 
Creator MENON, SR
SAHOO, BK
BALASUNDAR, S
GAWARE, JJ
JOSE, MT
VENKATRAMAN, B
MAYYA, YS
 
Subject SINGHBHUM SHEAR ZONE
BUILDING-MATERIALS
NATURAL RADIOACTIVITY
LUNG-CANCER
FLY-ASH
INDIA
DIFFUSION
DEPOSITS
RATES
RISK
Radon exhalation
Can technique
SSNTD
Leak
Thoron interference
Active monitor
Dynamic method
 
Description A comparative study has been carried out between the SSNTD based 'can' technique and active monitors based dynamic method using nine different samples, eight of granite and one of phosphogypsum. Besides radon (Rn-222) exhalation, thoron (Rn-220.) exhalation and Ra-226 and Th-232 content were also measured. The results are: (i) presence of significant thoron exhalation from samples and (ii) observation of thoron interference and leak (similar to 0.05 h(-1)) from the 'can' in the SSNTD based 'can' technqiue. The study unequivocally demonstrates the presence of intrinsic uncertainty in SSNTD based 'can' technique. Instead, dynamic method offers a more reliable and faster method. (C) 2015 Elsevier Ltd. All rights reserved.
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2016-01-14T12:57:45Z
2016-01-14T12:57:45Z
2015
 
Type Article
 
Identifier APPLIED RADIATION AND ISOTOPES, 99,172-178
0969-8043
http://dx.doi.org/10.1016/j.apradiso.2015.02.004
http://dspace.library.iitb.ac.in/jspui/handle/100/17555
 
Language en