Title: DETERMINATION OF THE CONTENT OF /cap alpha/-EMITTERS WITH SIMILAR ENERGIES IN AN ISOTOPIC MIXTURE
Abstract: Determination of the isotopic concentration by alpha spectrometry represents an important problem of radiometric analysis; this is made difficult by the fact that the energies of the elements at the start of the U and Th series lie within 4 and 5.7 Mev and determination of the individual lines requires a high resolution. In this respect the small surface and the resulting low efficiency of the best detectors represents a disadvantage. For this reason, an attempt was made to improve the resolution and to increase the sensitivity and the accuracy of the measurements by using alpha semiconducting devices for analyzing materials containing elements with overlapping lines. Mathematical formulas were derived on the basis of which mixtures, such as U/sup 238/ with E = 4.18 Mev and U/sup 235/ with E = 4.38 Mev could be analyzed, with a resolution of the instruments of 3%. In order to avoid an undue lengthening of the time required for the measurements, a 2channel, fully transistorized instrument was developed, allowing the separation of more than 2 components under field conditions. The method is suitable for use with alpha scintillation instruments, such as CsI(Tl) which have poor energy resolution but high efficiency. (TTT)
Publication Year: 1963
Publication Date: 1963-04-01
Language: en
Type: article
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