Standardization and difficulties of the thoron exhalation rate measurements using an accumulation chamber

被引：50
作者：
Ujic, P. [1 ]
Celikovic, I. [1 ]
Kandic, A. [1 ]
Zunic, Z. [1 ]
机构：
[1] Inst Nucl Sci Vinca, Belgrade 11001, Serbia
来源：
RADIATION MEASUREMENTS | 2008年 / 43卷 / 08期
关键词：
Thoron; Exhalation; Accumulation chamber; Sealed chamber;
D O I：
10.1016/j.radmeas.2008.03.003
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
Standardization of the thoron exhalation measurements is important for the intercomparison of the results among different laboratories. There are a few important distinctions between thoron (Rn-220) and radon (Rn-222) exhalation measurements using an accumulation chamber, due to a great difference between radon and thoron diffusion lengths in air, namely, short diffusion length of thoron indicates that it is very hard to attain homogenous distribution of the thoron concentration in an accumulation chamber of the usual dimensions, which is often neglected. It will be explained that the same model cannot be used both for radon and for thoron exhalation measurements. The results of the thoron exhalation measurements also depend on the sample thickness which must be considered. A new method for thoron exhalation measurement using an accumulation chamber is proposed. Comparisons between the existing and the proposed methods were performed on five different samples. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1396 / 1401
页数：6
相关论文
共 25 条
  • [1] [Anonymous], 2000, Report to the General Assembly, VII
  • [2] Factors controlling measurements of radon mass exhalation rate
    Chau, ND
    Chrusciel, E
    Prokólski, L
    [J]. JOURNAL OF ENVIRONMENTAL RADIOACTIVITY, 2005, 82 (03) : 363 - 369
  • [3] DOI M, 1992, THESIS NATL I RADIOL, P87
  • [4] An extensive indoor 222Rn/220Rn monitoring in North-East India
    Dwivedi, KK
    Mishra, R
    Tripathy, SP
    [J]. RADIATION MEASUREMENTS, 2005, 40 (2-6) : 621 - 624
  • [5] A study of radon and thoron release from Egyptian building materials using polymeric nuclear track detectors
    Hafez, AF
    Hussein, AS
    Rasheed, NM
    [J]. APPLIED RADIATION AND ISOTOPES, 2001, 54 (02) : 291 - 298
  • [6] Thoron versus radon: measurement and dosimetry
    Harley, NH
    Chittaporn, P
    Medora, R
    Merrill, R
    Wanitsooksumbut, W
    [J]. HIGH LEVELS OF NATURAL RADIATION AND RADON AREAS: RADIATION DOSE AND HEALTH EFFECTS, 2005, 1276 : 72 - 75
  • [7] RADIONUCLIDE CONTENT IN SOME BUILDING-MATERIALS AND THEIR RADON EXHALATION
    HOLY, K
    SYKORA, I
    CHUDY, M
    POLASKOVA, A
    FEJDA, J
    HOLA, O
    [J]. JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS, 1995, 199 (04): : 251 - 263
  • [8] ILIC R, 1997, RADON MEASUREMENTS E, P103
  • [9] Krisiuk EM, 1971, STUDY RADIOACTIVITY
  • [10] Assessing unregulated ionizing radiation exposures of US populations from conventional industries
    Pennington, Charles W.
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2006, 367 (01) : 139 - 155
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