Point defects in platinum

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Abstract
An investigation was made of the mobility and types of point defect introduced in platinum by deformation in liquid nitrogen, quenching into water from 1600°c, or reactor irradiation at 50°c. In all cases the activation energy for motion of the defect was determined from measurements of electrical resistivity. Measurements of density, hardness, and x-ray line broadening were also made where applicable. These experiments indicated that the principal defects remaining in platinum after irradiation were single vacant lattice sites and after quenching were pairs of vacant lattice sites. Those present after deformation in liquid nitrogen were single vacant, lattice sites and another type of defect, perhaps interstitial atoms.

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