Ni ion damage in Cu and Nb Page: 1 of 8
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Ni ION VAlMGE IN Cu AND Nb
J. B. Roberto and J. Narayan /I
Solid State Division, Oak Ridge National Laboratory
Oak Ridge, Tennessee 37830, U.S.A.
We have studied Ni ion damage in Cu using x-ray diffuse
scattering and transmission electron microscopy, and in Nb
using x-ray diffuse scattering. Single crystals of Cu and
Nb were irradiated at room temperature to a fluence of
1.2 x 1013/cm2 at 60 MeV, and Cu was also irradiated to
5 x 1012/cm2 at 4 MeV. The x-ray diffuse scattering from
loop-type defect clusters in the crystals was measured
near several Bragg reflections in order to probe the depth
distribution of the damage. In Cu, cluster size distri-
butions derived from the x-ray measurements agreed well
with TEM results. Comparison with fission reactor irradia-
tions using the damage energy concept suggests similarities
in retained damage between the neutron and Ni ion irradia-
In this work, we have used x-ray diffuse scattering and transmission
electron microscopy to investigate Ni ion damage in Cu, and x-rays to
study Ni ion damage in Nb. The emphasis of the work has been to develop
quantitative techniques for studying ion damage in solids, particularly
x-ray diffuse scattering. Three general areas were explored. First,
the retained damage from ambient temperature Ni ion irradiations in
Cu and Nb was characterized and compared with comparable damage energy
fast neutron irradiations. Secondly, Ni ion damage in Cu was compared
at 4 and 60 MeV in order to check for a dependence of the damage on
incident ion energy. Finally, the applicability of x-ray diffuse
scattering techniques to ion damaged crystals was demonstrated. This
latter result allows the investigation of ion damage in some crystals
which are difficult to study in the electron microscope and opens the
way for complementary studies in other crystals.
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Roberto, J.B. & Narayan, J. Ni ion damage in Cu and Nb, article, January 1, 1975; Tennessee. (https://digital.library.unt.edu/ark:/67531/metadc866240/m1/1/: accessed April 25, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.