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Electron Irradiation and Recovery of Tungsten
Author(s) -
Neely H. H.,
Keefer D. W.,
Sosin A.
Publication year - 1968
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.19680280225
Subject(s) - electrical resistivity and conductivity , tungsten , irradiation , kinetics , impurity , stage (stratigraphy) , residual resistivity , materials science , activation energy , analytical chemistry (journal) , trapping , residual , atomic physics , electron beam processing , chemistry , metallurgy , nuclear physics , physics , mathematics , geology , paleontology , ecology , organic chemistry , chromatography , quantum mechanics , algorithm , biology
Damage rates and recovery of 99.99% pure tungsten have been investigated after electron irradiation near 4 ° K by means of electrical resistivity. The damage rate data tend to a value of T 0 = 38 to 42 eV. The recovery of the residual electrical resistivity shows three major stages: Stage I from 4.2 to 100 ° K, Stage II from 100 to 500 ° K, Stage III from 500 to 1000 ° K. Stage I is dominated by only one major peak at 70 ° K. An analysis based on second‐order kinetics yielded a good fit to the data through 95% of the recovery. The energy derived was 0.17 eV. Only ≈ 26% recovery is seen in Stage I and we propose that the suppression is due to interstitial trapping by impurities. Stage III accounts for about 40% recovery of the induced resistivity and has a center temperature of 760 ° K. The stage was analysed assuming second‐order kinetics; this analysis gave an energy of 1.1 eV.