$sup 236$Pu TRACES DETERMINATION IN $sup 238$Pu BY $alpha$ SPECTROMETRY; Dosage de traces de plutonium-236 dans le plutonium-238 par spectrometrie $alpha$ (in French)
Two methods are described in this report for the determination of plutonium-236 traces in plutonium-238 by a spectrometry using semi-conductor detectors. The first method involves a direct comparison of the areas under the peaks of the {alpha} spectra of plutonium-236 and plutonium-238. The electrolytic preparation of the sources is carried out after preliminary purification of the plutonium. The second method makes it possible to determine the {sup 236}Pu/{sup 238}Pu ratio by comparing the areas of the {alpha} peaks of uranium-232 and uranium-234, which are the decay products of the two plutonium isotopes respectively. The uranium in the source, also deposited by electrolysis, is separated from a 1 mg amount of plutonium either by a T.L.A. extraction, or by the use of ion-exchange resins. The report ends with a discussion of the results obtained with plutonium of two different origins. (authors) [French] Deux methodes de determination de traces de plutonium-236 dans du plutonium-238 par spectrometrie {alpha} a l'aide de detecteurs a semi-conducteurs sont decrites dans ce rapport. La premiere fait intervenir la comparaison directe des aires comprises sous les pics des spectres a du plutonium- 236 et du plutonium-238. La preparation electrolytique des sources est faite apres purification prealable du plutonium. La seconde permet de determiner le rapport {sup 236}Pu/{sup 238}Pu en comparant les aires des pics {alpha} de l'uranium 232 et de l'uranium 234, fils respectifs des deux isotopes du plutonium. L'uranium de la source egalement deposee par electrolyse est separe d'une quantite de 1 mg de plutonium, soit par extraction a la T.L.A., soit a l'aide de resines echangeuses d'ions. La discussion des resultats obtenus en utilisant du plutonium de deux provenances distinctes termine l'expose. (auteurs)
- Research Organization:
- Commissariat a l'Energie Atomique, Fontenay-aux-Roses (France). Centre d'Etudes Nucleaires
- NSA Number:
- NSA-23-049730
- OSTI ID:
- 4760530
- Report Number(s):
- CEA-R-3773
- Country of Publication:
- France
- Language:
- French
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Related Subjects
ALPHA SPECTROMETERS
DETERMINATION
PLUTONIUM 236
PLUTONIUM 238
RADIATION DETECTORS
SEMICONDUCTORS
TRACE AMOUNTS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
PLUTONIUM ISOTOPES Pu-236/determination of trace amounts of
in plutonium-238 using semiconductor detectors
$alpha$ spectrometric
PLUTONIUM ISOTOPES Pu-238/analysis for trace amounts of plutonium-236 using semiconductor detectors
$alpha$ spectrometric