Fundamental and excited states of F-type centres in MgSiO3 perovskite
✍ Scribed by Arvids Stashans; Lorena Piedra; Tamara Briceño
- Publisher
- Elsevier Science
- Year
- 2010
- Tongue
- English
- Weight
- 193 KB
- Volume
- 405
- Category
- Article
- ISSN
- 0921-4526
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📜 SIMILAR VOLUMES
## Abstract Excitons bound to neutral impurities are studied with respect to excited states by means of excitation spectroscopy in CdS single crystals at 1.8 K. The symmetry of the four excited states of the exciton bound to neutral donor (placed energetically below the free exciton) can be deduced
For some lower-lying excited states of NH3 and H20, ab initio SCF calculations indicate the presence of potential maxima in the paths leading to dissociation into NH2 +H and OH +H. The occurrence of these maxima is probably connected with changes in the highest occupied molecular orbital during diss