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Optical Studies on Europium Doped K 2 SO 4
Author(s) -
Kumar V. S. Kishan,
Sastry S. B. S.,
Acharyulu B. S. V. S. R.
Publication year - 1989
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.2221550239
Subject(s) - europium , thermoluminescence , ion , irradiation , fluorescence , doping , analytical chemistry (journal) , emission spectrum , absorption (acoustics) , materials science , divalent , luminescence , population , chemistry , atomic physics , spectral line , physics , optics , optoelectronics , demography , organic chemistry , chromatography , astronomy , sociology , nuclear physics , metallurgy , composite material
Optical absorption (OA), fluorescence, and thermoluminescence are studied on γ‐irradiated K 2 SO 4 :Eu crystals. The OA spectrum shows a prominent peak around 5.33 eV which is identified as due to europium ions in their divalent state (Eu 2+ ). On irradiation, the population of Eu 2+ is found to increase. Fluorescence shows the characteristic Eu 2+ emission around 3.05 eV. The glow curve consists of an intense peak around 365 K with two weaker ones around 415 and 435 K. The emission under all these glow peaks is the same and consists of a single band around 3.06 eV attributable again to the characteristic emission of Eu 2+ ions.