The effect of neutron and gamma irradiation on the dislocation relaxation peak in silver |
| |
Authors: | W E Alnaser M Zein |
| |
Institution: | (1) Physics Department, University of Bahrain, P.O. Box 32038, Bahrain |
| |
Abstract: | Summary The internal-friction spectrum has been determined in extremely pure polycrystalline silver crystals after being subjected
to neutron and gamma irradiation. The spectra obtained for an applied frequency of 10 MHz show that the mechanical losses
due to dislocation relaxation decrease as the doses of neutron and gamma radiation increase. The effect of gamma radiation
was found to be more significant than that of neutron irradiation. The relationship between damping neutron and gamma dose
was found to be of the formQ
max
−1
α ΛD
η, where η is equal to −1.2 for neutron and −1.45 for gamma irradiation. The variations of the peak height and width, and temperature
of the dislocation relaxation peak as functions of neutron and gamma doses are explained in terms of the pair-kink formation
model. |
| |
Keywords: | Mechanics and rheology of solids |
本文献已被 SpringerLink 等数据库收录! |