Sur l'analogie de la restauration des metaux C.F.C. et hexagonaux apres irradiation a basse temperature

Schumacher, Dieter; Nicoud, J.C.; Delaplace, Joseph; Hillairet, J.

doi:10.1016/0375-9601(67)90286-1

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…In the case of beryllium several earlier communications [l to 41 have shown that after neutron irradiation at 27 and 77 "K and after electron irradiation at 20 OK the recovery of the electrical resistivity and the release of stored energy follow the scheme generally observed in irradiated metals. Several recovery phenomena exhibit analogies to those observed in irradiated aluminium [5].…”

Section: Introductionmentioning

confidence: 54%

“…3, but has also been demonstrated in our earlier resistivity and stored energy measurements in a much wider range of defect concentrations [l, 21. I n analogy to the similar recovery phenomena in irradiated aluminium [5] we consider this stage to correspond to stage I11 in aluminium. It occurs not only after neutron irradiation, but also after electron irradiation, but is less clearly resolved in the latter case [l].…”

Section: Low-temperature Neutron Radiation Damage and Recovery In Bermentioning

confidence: 99%

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Low‐Temperature Neutron Radiation Damage and Recovery in Beryllium

Delaplace

Hillairet

Nicoud

et al. 1968

Physica Status Solidi (b)

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a)l), and G . VOGL (b) I n beryllium neutron irradiated at 4.2 OK, the defect productionand subsequent recovery up to 350 OK have beenstudied by means of electrical resistivity measurements. The data are discussed in view of our present knowledge on point defect phenomena in other metals, in particular aluminium, which exhibits after neutron irradiation a similar recovery behaviour as beryllium.On a irradie du beryllium par des neutrons h4,2 O K et 6tudiB la creation et la restauration de defauts cristallins par des mesures de rksistivite electrique. On discute les resultats B la lumibre de notre connaissance actuelle sup les phbnomhes diis aux defauts ponctuels dans d'autres metaux, en particulier l'aluminium, dont l'allure de la restauration a p r b irradiation aux neutrons est semblable $. celle du beryllium.

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Section: Introductionmentioning

confidence: 54%

Section: Low-temperature Neutron Radiation Damage and Recovery In Bermentioning

confidence: 99%

Low‐Temperature Neutron Radiation Damage and Recovery in Beryllium

Delaplace

Hillairet

Nicoud

et al. 1968

Physica Status Solidi (b)

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Stage I Recovery of Resistivity in Electron‐Irradiated Silver and Gold. I. Silver

Wiffen

Snead

Kauffman

1969

Physica Status Solidi (b)

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The stage I recovery of silver has been investigated by resistivity measurements and isochronal annealing of 99.999% purity silver after irradiation with 2.0 MeV electrons a t liquid helium temperature. Detailed annealing schedules for several different initial defect concentrations and for a radiation doped run confirmed the general similarity in the stage I recovery behavior of silver and copper and revealed the systematic differences between the two metals. Silver shows several first-order recovery substages and shows a small component of recovery due to free interstitial migration near 31 O K . The total amount of recovery in stage I was found to be a sensitive function of defect concentration, for small defect concentrations, with the amount of recovery increasing for increasing initial damage over the range investigated. The observed results are explained in terms of a "competitive process, one interstitial model" with most of stage I recovery due to close pair recombination. The fate of freely migrating interstitials is governed by the relative importance of impurity trapping, vacancy annihilation, and interstitial complex formation, The importance of each of these processes depends upon the initial defect concentration, impurity concentration, and the effectiveness of vacancies and interstitials for capturing interstitials. The higher probability of dimer formation in silver than in copper is a result of the larger radius of the interstitial strain field in silver and results in the smaller amount of stage I recovery, the smaller size of Ig, and is a major contributor to the observed lack of dose dependence in silver.Die Erholungsstufe I von Silber wurde durch isochrone Erholungsmessungen des elektrischen Widerstandes von 99.999% reinem Silber nach Bestrahlung mit 2,0 MeV Elektronen bei Heliumtemperatur untersucht. Detaillierte AnlaBzeitpline fur verschiedene anfiingliche Fehlstellenkonzentrationen und fur eine Probe mit Vorbestrahlung bestatigten die allgemeine ffbereinstimmung im Erholungsverhalten der Stufe I von Silber und Kupfer und deckten systematische Unterschiede der beiden Metalle auf. Silber zeigt einige Unterstufen mit der Erholungskinetik einer Reaktion erster Ordnung, sowie auch einen kleinen Teil der Erholung, in der Niihe von 31 OK, der auf freie Wanderung von Zwischengitteratomen zuruckzufiihren ist. Es erwies sich, daB der Gesamtbetrag der Erholung in der Stufe I, bei kleiner Fehlstellenkonzentration, stark von der Fehlstellenkonzentration abhiingt ; im untersuchten Bereich nimmt der Betrag der Erholung mit zunehmender Anfangsschiidigung zu. Die beobachteten Resultate werden durch ein ,,KonkurrenzprozeO-, Ein-Zwischengitteratom-Modell" erklart, wobei der groBte Teil des Erholung in Stufe I auf Rekombination unausgedehnter Frenkel-Paare zuriickzufiihren ist. Das Schicksal sich frei bewegender Zwischengitteratome ist durch die relative Wichtigkeit folgender Prozesse bestimmt: Einfangen durch Fremdatome, Annihilation durch Fehlstellen und Bildung von Zwischengitteratomkomplexen. Die Wichtig...

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