## Absorption measurements in the region of 2200 A to 10,000 A were made on optically polished thoria crystals of 99.9 per cent purity. Firing the crystals in air and in vacuum at different temperatures gave the red, white and yellow forms described by Weinreich and Dzmforth.' The present improved
Apparent optical absorption index of molten beryllium oxide
β Scribed by J.M. Adams
- Publisher
- Elsevier Science
- Year
- 1969
- Tongue
- English
- Weight
- 401 KB
- Volume
- 9
- Category
- Article
- ISSN
- 0022-4073
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The optical absorption spectrum for the rare-earth ion Er 3+ in an amorphous polymer host poly(ethylene oxide) (PEO) has been calculated. A modified Judd-Ofelt theory has been exploited to calculate the oscillator strengths for the electric-dipole transitions within the 4 f 11 configuration. Such tr