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Absorption and luminescence spectroscopy of manganese-doped BaSO4 crystals

✍ Scribed by Thomas C. Brunold; Hans U. Güdel

Publisher
Elsevier Science
Year
1996
Tongue
English
Weight
513 KB
Volume
257
Category
Article
ISSN
0009-2614

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✦ Synopsis

The polarized 10 K single-crystal absorption spectra of Mn-doped BaSO 4 are reinterpreted and the first luminescence spectra are presented. As a consequence of the high-temperature preparation there is a simultaneous presence of MnO43-and MnO42-in the BaSO 4 host with a ratio close to one. This is mainly responsible for the erroneous assignments in the literature. The broad absorption bands between 10000 and 16500 cm -l are due to 3A 2 --> 3T2, 3T 1 (d ~ d) transitions of the MnO43-ion. The 2E ~ 2T 2 (d ~ d) transition of MnO 2-originates at 11074 cm-~.

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