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Israël, H.; Israël, G. W. (2011)
Publisher: Co-Action Publishing
Journal: Tellus A
Languages: English
Types: Article
To achieve continuous measurements, an aspiration process was developed, permitting a direct measurement of the radon (Rn222) and thoron (Rn220) contributions to the ionization. After passing through a filter that holds back all aerosols and radon and thoron daughter ions, the air streams through an approximately 300 liter ionization chamber. The current, measured with a vibrating reed electrometer, is composed of three parts: background, radon contribution and thoron contribution, with each component resolved by appropriate methods. The sensitivity limit amounts to some 0,8·10−14 c/1 for radon and 0,5·10−14 c/1 for thoron with a resolution time of about 220 sec. This report deals with the principle of measurement and its use for the determination of the radon and thoron content of the lower atmosphere.DOI: 10.1111/j.2153-3490.1966.tb00269.x
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    • FONTA NJ.,, BLANC,D., BONNAFOUMS,., and the thoron (Rn-220) content of the atmosphere BOUVILLEA, ,, 1961, Dosage du radon et du Tellus (this issue).
    • thoron contenus dans l'air atmosphbrique, appli- ISRAELH,., 1962, Die naturliche und kunstliche cation B l'btude de 1'Bquilibre radioactif entre ces Radioaktivitiit der Atmosphiire. See: Nuclear gaz et leurs descendants. Journ. Physique Rad., Radioation in Qeophysics (edited by H. ISRAEL 22, 179A-181A. and A. KREBS)S,pringer-Verlag,pp. 76-96.
    • FONTANJ.,, BLANCD, ., and BOUVILLEA,., 1962a, ISRAELH,., 1964a, The Radon-220 content of the Emploi d'un systbme de coincidences dans le atmosphere. See: The Natural Radiation Environdosage sblectif du radon et du thoron atmos- ment (edited by JOHAN. s. ADAMSand WAYNE phbriques. Journ. Physique Rad., 28, pp. 333-334. M. LOWDERT),he University of Chicago Press, FONTANJ,., BLANC,D., BONNAFOUSM,., and pp. 313-314.
    • BOUVILLEA,., 19626, Une methode de dosage ISRAELH,., 1964b, Remarks on the thoron content direct du radon et thoron contenus dans l'atmos- of the atmosphere. Journ. A h . Terr. Phya., 26, phbre. Nouvo Cinaento, Suppl. Vol. 29, Ser. X, pp. 787-789.
    • pp. 132-143. ISRAELH, ., and ISRAELG, . W., 1965, Measurements ISRAEGL. ,W., 1964, Neues Verfahren zur Direkt- of the thoron (Rn-220)content of the atmosphere messung des atmosphiirischen Thoron-Gehaltes. and their application in meteorology, with an Natunvissenachaften, 61, pp. 134-135. appendix: Radon (Rn-222) researches. Final ISRAEL,G. W., 1966a, Thoron (Rn-220) measure- Technical Report, Contract No. Da-81-591-EUCments in the atmosphere and their application 3483-01-552--0136.
    • in meteorology. TeZZus 17, pp. 383-388. ISRAELH,., HORBERTM,., and ISRAELG, . W., 1966, ISRAEGL., W., 19656, Der Thorongehalt in der Results of continuous measurements of radon bodennahen Atmosphiire. Dissertation Aachen. and its decay products in the lower atmosphere.
    • ISRAEL,G. W., 1966, Meteorological influences on TeZlua (this issue).
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