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Crystallographic study and self irradiation damage on plutonium at low temperature; Etude cristallographique et effets de l'auto-irradiation sur le plutonium a basse temperature

Abstract

We have studied the variation of the parameters of {alpha} plutonium and aluminium stabilised {delta} alloys at low temperature, in order to verify the existence of an antiferromagnetic transition at low temperature. The effects of {alpha} particles on the length of a polycrystal of {alpha} plutonium at 4,2 deg. K are also presented at 18 deg. K a plutonium shows no crystallographic change from its structure at room temperature. The thermal expansion coefficients along the 3 axis seem to be positive at this temperature. Therefore a magnetic contribution on thermal expansion coefficients must be small. A dilatation anomaly of {delta}Pu has been observed at 100 deg. K, together with an anomaly of the diffraction lines intensity. No sur-structure line has been observed at 20 deg. K. The length of {alpha} plutonium Increases with time at a rate of about 5 x 10{sup -6} per hour when held in liquid helium. This effect is attributed to the creation of Frenkel pairs. (author) [French] On presente une etude cristallographique a basse temperature du plutonium {alpha} et stabilise {delta} par des additions d'aluminium en vue de verifier l'existence d'une transformation antiferromagnetique a basse temperature. L'effet des particules {alpha} a 4,2 deg. K sur  More>>
Authors:
Solente, P [1] 
  1. Commissariat a l'Energie Atomique, Fontenay-aux-Roses (France). Centre d'Etudes Nucleaires
Publication Date:
May 01, 1965
Product Type:
Thesis/Dissertation
Report Number:
CEA-R-2735
Resource Relation:
Other Information: TH: These troisieme cycle metallurgie speciale; 33 refs
Subject:
36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; ANTIFERROMAGNETISM; DILATANCY; ELECTRIC CONDUCTIVITY; FRENKEL DEFECTS; LATTICE PARAMETERS; PLUTONIUM BASE ALLOYS; PLUTONIUM-ALPHA; PLUTONIUM-DELTA; SELF-IRRADIATION; TEMPERATURE DEPENDENCE; TEMPERATURE RANGE; X-RAY DIFFRACTOMETERS
OSTI ID:
20702682
Research Organizations:
CEA Fontenay-aux-Roses, 92 (France); Faculte des Sciences de l'Universite de Paris, 75 (France)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
TRN: FR05R2735017807
Availability:
Available from INIS in electronic form
Submitting Site:
FRN
Size:
60 pages
Announcement Date:
Apr 07, 2006

Citation Formats

Solente, P. Crystallographic study and self irradiation damage on plutonium at low temperature; Etude cristallographique et effets de l'auto-irradiation sur le plutonium a basse temperature. France: N. p., 1965. Web.
Solente, P. Crystallographic study and self irradiation damage on plutonium at low temperature; Etude cristallographique et effets de l'auto-irradiation sur le plutonium a basse temperature. France.
Solente, P. 1965. "Crystallographic study and self irradiation damage on plutonium at low temperature; Etude cristallographique et effets de l'auto-irradiation sur le plutonium a basse temperature." France.
@misc{etde_20702682,
title = {Crystallographic study and self irradiation damage on plutonium at low temperature; Etude cristallographique et effets de l'auto-irradiation sur le plutonium a basse temperature}
author = {Solente, P}
abstractNote = {We have studied the variation of the parameters of {alpha} plutonium and aluminium stabilised {delta} alloys at low temperature, in order to verify the existence of an antiferromagnetic transition at low temperature. The effects of {alpha} particles on the length of a polycrystal of {alpha} plutonium at 4,2 deg. K are also presented at 18 deg. K a plutonium shows no crystallographic change from its structure at room temperature. The thermal expansion coefficients along the 3 axis seem to be positive at this temperature. Therefore a magnetic contribution on thermal expansion coefficients must be small. A dilatation anomaly of {delta}Pu has been observed at 100 deg. K, together with an anomaly of the diffraction lines intensity. No sur-structure line has been observed at 20 deg. K. The length of {alpha} plutonium Increases with time at a rate of about 5 x 10{sup -6} per hour when held in liquid helium. This effect is attributed to the creation of Frenkel pairs. (author) [French] On presente une etude cristallographique a basse temperature du plutonium {alpha} et stabilise {delta} par des additions d'aluminium en vue de verifier l'existence d'une transformation antiferromagnetique a basse temperature. L'effet des particules {alpha} a 4,2 deg. K sur la longueur d'un polycristal de plutonium {alpha} a egalement ete etudie. Il a ete determine que le plutonium {alpha} ne mange pas de phase allotropique Jusqu'a 18 deg. K, les coefficients de dilatation des trois axes de la maille semblent rester positifs. Une eventuelle contribution magnetique sur les coefficients de dilatation devrait donc etre faible. Une legere anomalie de dilatation de Pu {delta} a ete observee a 100 deg. K ainsi qu'une anomalie d'intensite des raies de diffraction. Aucune raie de surstructure n'a ete observee. Le plutonium {alpha} s'allonge lorsqu'il est plonge dans l'helium liquide d'un taux de l'ordre de 5 x 10{sup -6}/heure. Cet effet a ete attribuee a la creation de paires de Frenkel. (auteur)}
place = {France}
year = {1965}
month = {May}
}