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Mesure du thorium à l'échelle du millimicrogramme

par Picciotto, Edgardo ;Wilgain, S.
Référence Analytica chimica acta, 16, C, page (530-540)
Publication Publié, 1957

Article révisé par les pairs

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Résumé :

Thorium in solution is measured by the tracks of a-particles, -formed from RdTh, in nuclear photographic emulsions. Using the method described, it is possible; to detect RdTh in equilibrium with 10-9 g Th, contained in a volume of several hundrcdths of a millilitre, in the presence of all the other stähle or radioactive nuclides. The accuracy is chiefly limited by the statistical fluctuations of the number of disintegrations; the experimental errors are in the order of ±3%. The method has heen checked on standard solutions. The experimental techniques, diffusion of thoron, and interference of RdAc, are discussed in detail. © 1957.