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Gamma‐Induced Absorption Bands Associated with Tl + , Pb 2+ , or Bi 3+ in Potassium Borate Glasses
Author(s) -
BISHAY A. M.,
MAKLAD M. S.
Publication year - 1967
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1967.tb14981.x
Subject(s) - alkali metal , boron , thallium , halide , potassium , cerium , analytical chemistry (journal) , absorption (acoustics) , ion , chemistry , boro , absorption band , inorganic chemistry , materials science , physics , organic chemistry , chromatography , optics , composite material
Gamma irradiation of potassium borate glasses containing about 1.8 mole % Tl + , Pb 2+ , or Bi 3+ resulted in two induced absorption bands which the authors call T and L bands. The T band was observed at about 1.1, 1.55, or 1.8 ev, and the L band was observed at about 1.8, 2.6, or 2.7 ev in alkali borate glasses containing Tl + , Pb 2+ , or Bi 3+ , respectively. The shifting of the band positions to higher energies was attributed to the increasing polarizing power of these ions as in the case of the F band induced in alkali halides. The effect of the addition of cerium on the intensity of the T and L bands induced in glasses containing lead or thallium and prepared under different melting conditions suggested strongly that these two bands are associated with electron trap centers near these ions.