Absorption spectra of Cr3+in Al2O3under shock compression
β Scribed by Tsuneaki Goto; Thomas J. Ahrens; George R. Rossman
- Publisher
- Springer-Verlag
- Year
- 1979
- Tongue
- English
- Weight
- 646 KB
- Volume
- 4
- Category
- Article
- ISSN
- 0342-1791
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π SIMILAR VOLUMES
Pseudo-Stark splittings have been measured for optical transitions of V\*, Cr3+ and Co3\* in corundum (cr-AlaO3) when these crystals are submitted to dc and ac fields. Quantitative results have been obtained for dc electric field parallel to the C3-axis. With the electric field perpendicular to the
Subjecting the ceramic YBaCuO of the I-2-3 composition to shock compression (p=270 kbar) produces a ceramic of the same composition which under normal conditions (p=O,T=300K) has a tetragonal structure and undergoes a transition to the superconducting state at a temperature TcO~93K.
During cyclic deformation, temperature measurements were carried out with thermocouples. On the basis of the thermoelastic effect, a thermometric method is described which allows the determination of the elastic part of the total deformation. Thus effective stress changes can be determined. The syst