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Mössbauer Measurements of the Debye‐Waller Factor of Gold in Platinum after Low‐Temperature Neutron Irradiation
Author(s) -
Mansel W.,
Vogl G.,
Vogl W.,
Wenzl H.,
Barb D.
Publication year - 1970
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.19700400203
Subject(s) - debye–waller factor , irradiation , platinum , materials science , mössbauer spectroscopy , neutron , atom (system on chip) , lattice constant , neutron temperature , crystallography , condensed matter physics , chemistry , nuclear physics , physics , optics , biochemistry , computer science , diffraction , embedded system , catalysis
Pt 197 , which decays with 20 h half‐life to Au 197 , is produced by irradiation of platinum samples with reactor neutrons at 4.6 °K. At the same time structural lattice defects are formed. Using the Mössbauer effect of Au 197 , the Debye‐Waller factor of the gold atoms is measured. A reduction of up to approximately 10% in the Debye‐Waller factor is found, which is attributed to irradiation‐produced defects. This behaviour is interpreted in terms of an interaction of defects formed by thermal and fast neutrons. A change of the coupling constant of the Au 197 atom to its neighbours is assumed to be responsible for the reduction of the Debye‐Waller factor.