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Optical and Polarized Luminescence Studies on RbI:Pb 2+ at Liquid Helium Temperatures
Author(s) -
Sapru S.,
Sastry S. B. S.
Publication year - 1981
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.2221060133
Subject(s) - luminescence , excitation , liquid helium , atomic physics , absorption (acoustics) , helium , charge (physics) , materials science , physics , optoelectronics , optics , quantum mechanics
Optical absorption, luminescence, and polarized luminescence studies are made on RbI:Pb 2+ from 4.7 to 50 K. It is found that the charge compensating vacancy is predominantly in the next‐nearest neighbour sites at these temperatures. The B‐band shows a splitting and the emission under B‐band excitation disappears around 20 K. Possible crossing of 3 T 2u and 3 E u levels with 1 A 1g is suggested to explain the behaviour.