A simple method for calibration of Lucas scintillation cell counting system for measurement of 226Ra and 222Rn

Journal of Radiation Research and Applied Sciences. 2014;7(4):472-477

 

Journal Homepage

Journal Title: Journal of Radiation Research and Applied Sciences

ISSN: 1687-8507 (Print); 2314-7164 (Online)

Publisher: Taylor & Francis Group

Society/Institution: The Egyptian Society of Radiation Sciences and Applications

LCC Subject Category: Science: Physics: Nuclear and particle physics. Atomic energy. Radioactivity

Country of publisher: United Kingdom

Language of fulltext: English

Full-text formats available: PDF, HTML

 

AUTHORS

N.K. Sethy (Corresponding author.; Bhabha Atomic Research Centre, Health Physics Division, Environmental Survey Laboratory, Health Physics Unit, Jaduguda 832102, India)
V.N. Jha (Bhabha Atomic Research Centre, Health Physics Division, Environmental Survey Laboratory, Health Physics Unit, Jaduguda 832102, India)
P.M. Ravi (Bhabha Atomic Research Centre, Health Physics Division, Environmental Survey Laboratory, Health Physics Unit, Jaduguda 832102, India)
R.M. Tripathi (Bhabha Atomic Research Centre, Health Physics Division, Environmental Survey Laboratory, Health Physics Unit, Jaduguda 832102, India)

EDITORIAL INFORMATION

Blind peer review

Editorial Board

Instructions for authors

Time From Submission to Publication: 16 weeks

 

Abstract | Full Text

Known quantity of radium from high grade ore solution was chemically separated and carefully kept inside the cavity of a Lucas Cell (LC). The 222Rn gradually builds up and attain secular equilibrium with its parent 226Ra. This gives a steady count after a suitable buildup period (>25 days). This secondary source was used to calibrate the radon counting system. The method is validated in by comparison with identical measurement with AlphaGuard Aquakit. The radon counting system was used to evaluate dissolved radon in ground water sample by gross alpha counting in LC. Radon counting system measures the collected radon after a delay of >180 min by gross alpha counting. Simultaneous measurement also carried out by AlphaGuard Aquakit in identical condition. AlphaGuard measures dissolved radon from water sample by constant aeration in a closed circuit without giving any delay. Both the methods are matching with a correlation coefficient of >0.9. This validates the calibration of Lucas scintillation cell counting system by designed encapsulated source. This study provides an alternative for calibration in absence of costly Radon source available in the market. Keywords: Radon counting system, Calibration, Lucas cell