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Title:Low temperature electron irradiation and annealing of pure cadmium
Author(s):Menendez, Maria Antonia
Doctoral Committee Chair(s):Koehler, James S.
Department / Program:Physics
Discipline:Physics
Degree:Ph.D.
Genre:Dissertation
Subject(s):electron irradiation
annealing
pure cadmium
activation energies
kinetics
Abstract:In this study of cadmium after electron irradiation below 2°K, it has been observed that the damage production rate in Cd is (4.13 ± .16) x -26 / -2 ° 10 stcm (e /cm ) for irradiation with 2.5 MeV electrons at 1.5 K. New annealing peaks are observed at 1.825°K and at about 2°K with activation energies of (2.6 ± .1) x 10-3 eV and (2.77 ± .34) x 10-3 eV, respectively. The peak at about 2°K exhibits dose-dependence, but it is better described by first order kinetics; this peak is believed to correspond to the long- range migration of the self-interstitial, preferentially to impurities where they form clusters. It has been found that subthreshold irradiation results in the annealing of damage already present. This radiation annealing effect may be a contributing factor to the "seesaw effect." Another physical process may contribute to the "seesaw effect," namely, the trapping of interstitials at impurities and their subsequent detrapping during annealing.
Issue Date:1979
Genre:Dissertation / Thesis
Type:Text
Language:English
URI:http://hdl.handle.net/2142/25555
Rights Information:1979 Maria Antonia Menendez
Date Available in IDEALS:2011-06-28
Identifier in Online Catalog:397546


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