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Effect of γ‐Irradiation on Eu 2+ Ions in KCl Crystals
Author(s) -
Opyrchał H.,
Nierzewski K. D.,
Macalik B.
Publication year - 1982
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.2221120209
Subject(s) - europium , thermoluminescence , irradiation , electron paramagnetic resonance , ion , annealing (glass) , dipole , analytical chemistry (journal) , absorption (acoustics) , materials science , chemistry , radiochemistry , nuclear magnetic resonance , physics , nuclear physics , organic chemistry , chromatography , composite material
Optical absorption and emission, EPR, ITC, and thermoluminescence spectra of RT γ‐irradiated KCl:Eu 2+ crystals are examined. ITC and EPR measurements of heavily irradiated samples point to the lack of any I.V. Eu 2+ dipoles. Examination of optical properties permits to exclude the presence of Eu + and Eu 3+ ions. On the other hand, the examination of thermal annealing effects in heavily irradiated samples reveals the lack of any correlation between the recovery of original europium dipoles and the decay of colour centres. The results obtained can be understood by assuming radiation field induced aggregation of europium dipoles.