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Length Changes on the Irradiation of Gold with α‐Particles in the Temperature Region of —20 to + 90 °C
Author(s) -
Isebeck K.
Publication year - 1965
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19650080218
Subject(s) - annealing (glass) , irradiation , activation energy , foil method , materials science , cascade , diffusion , atomic physics , analytical chemistry (journal) , crystallography , chemistry , thermodynamics , metallurgy , composite material , nuclear physics , physics , chromatography
The change in length of thin gold foils (99.999% purity) was studied on irradiation with α‐particles in the temperature region of –20 to +90 °C. At temperatures below 0 °C about 20 to 50% of the recovery of the change in length was found to be a first order, diffusion limited reaction with an activation energy of (0.65 ± 0.07) eV. The defect densities were of the order of 10 −6 . The annealing behaviour is interpreted as the recombination of interstitial atoms with vacancies produced within the same defect cascade. Above 0 °C, the initial dilatation on irradiation is followed by a gradual contraction of the foil. This behaviour is interpreted as being due to the migration of interstitial atoms to the surface of the foil. At temperatures between 40 and 65 °C the recovery was found to be exponential after prolonged annealing for about 50% of the recovery. The activation energy is (0.81 ± 0.03) eV. The latter portion of the recovery is identified with the migration of vacancies to dislocations.