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Optical absorption of Bi +++ , Hg 0 , and Cd 0 centres
Author(s) -
Zu Siederdissen J. Höner,
Fischer F.
Publication year - 1971
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.2220480120
Subject(s) - alkali metal , halide , absorption (acoustics) , chemistry , analytical chemistry (journal) , absorption spectroscopy , ion , doping , atomic physics , inorganic chemistry , materials science , physics , optics , organic chemistry , chromatography , composite material , optoelectronics
For a systematic study of the isoelectronic series of s 2 ‐type centres the absorption bands of some missing centres are measured. Thin layers of alkali halides doped with monodisperse Hg 0 or Cd 0 are formed by quenching condensation. Single crystals of alkali halides are doped with Bi +++ ′. In addition of the common bands of s 2 ‐type spectra Bi +++ shows a strong D′‐band. In the isoelectronic series — like Au − , Hg 0 , TI + , Pb ++ , Bi +++ — the difference in excitation energies between centre and free ion is nearly proportional to the ionic charge.