title: A comparative study between the dynamic method and passive can technique of radon exhalation measurements from samples.
abstract: 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 ((222)Rn) exhalation, thoron((220)Rn) exhalation and (226)Ra and (232)Th content were also measured. The results are: (i) presence of significant thoron exhalation from samples and (ii) observation of thoron interference and leak (~0.05h(-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.
authors.affiliation: Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India.
authors.forename: Sreeja
authors.initials: S
authors.lastname: Raj Menon
authors.affiliation: Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: B K
authors.initials: BK
authors.lastname: Sahoo
authors.affiliation: Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India.
authors.forename: S
authors.initials: S
authors.lastname: Balasundar
authors.affiliation: Radiological Physics and Advisory Division, Bhabha Atomic Research Centre, Mumbai 400085, India.
authors.forename: J J
authors.initials: JJ
authors.lastname: Gaware
authors.affiliation: Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India.
authors.forename: M T
authors.initials: MT
authors.lastname: Jose
authors.affiliation: Radiological Safety Division, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamilnadu, India.
authors.forename: B
authors.initials: B
authors.lastname: Venkatraman
authors.affiliation: Department of Chemical Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India. Electronic address: ysmayya@gmail.com.
authors.forename: Y S
authors.initials: YS
authors.lastname: Mayya
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D016902:Air Pollution, Indoor / Q000032:analysis*; D003252:Construction Materials / Q000032:analysis*; D008422:Materials Testing / Q000379:methods; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods*; D011886:Radon / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013048:Specimen Handling / Q000379:methods
chemical_list: D000396:Air Pollutants, Radioactive; D011886:Radon
keywords: Active monitor; Can technique; Dynamic method; Leak; Radon exhalation; SSNTD; Thoron interference