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Radiation Damage Effects on the Magnetic Properties of Pu(1-x)Amx (x=0.224)

Published online by Cambridge University Press:  26 February 2011

Scott K. McCall ,
M. J. Fluss ,
B. W. Chung ,
M. W. McElfresh  and
R. G. Haire
Scott K. McCall
Affiliation:
mccall10@llnl.gov, LLNL, CMS, L-356, 7000 East Ave, Livermore, CA, 94550, United States
M. J. Fluss
Affiliation:
fluss1@llnl.gov, Lawrence Livermore National Laboratory, Livermore, CA, 94550, United States
B. W. Chung
Affiliation:
chung7@llnl.gov, Lawrence Livermore National Laboratory, Livermore, CA, 94550, United States
M. W. McElfresh
Affiliation:
mcelfresh1@llnl.gov, Lawrence Livermore National Laboratory, Livermore, CA, 94550, United States
R. G. Haire
Affiliation:
hairerg@ornl.gov, Oak Ridge National Laboratory, Oak Ridge, TN, 37831, United States
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Abstract

Pu(Am) is stable in the fcc δ-phase from a few atomic percent to nearly 80 atomic percent Am, expanding the average interatomic separation as the alloy concentration of Am increases. Both Pu and Am spontaneously decay by α-emission creating self-damage in the lattice in the form of vacancy-interstitial pairs and their aggregates. At sufficiently low temperatures, the damage is frozen in place, but can be removed by thermal annealing at sufficiently high temperatures, effectively resetting the system to an undamaged condition. The magnetic susceptibility and magnetization are observed to increase systematically as a function of accumulated damage in the fcc δ-Pu(1-x)Am(x) (x=0.224). Some results of these observations are reported here.

Keywords

magnetic propertiesPuradiation effects
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 986: Symposium OO – Actinides 2006 – Basic Science, Applications and Technology , 2006 , 0986-OO03-03
Copyright
Copyright © Materials Research Society 2007

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