The red to near-infrared luminescence in alkali feldspar
β Scribed by Robert J. Brooks; Adrian A. Finch; David E. Hole; Peter D. Townsend; Zheng-Long Wu
- Publisher
- Springer
- Year
- 2002
- Tongue
- English
- Weight
- 304 KB
- Volume
- 143
- Category
- Article
- ISSN
- 0010-7999
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M easured nadir-viewed narrow-band rejectances in red and near infrared channels simulating AVHRR Channels 1 and 2 are compared with measured integrated solar spectrum hemispherical albedos. Rejectances and albedos were measured from an aircraft over four widely diferent vegetation surfaces in south
## Abstract The frequency upconversion emissions of NaYF~4~ nanocrystals embedded in transparent glass ceramics codoped with Yb^3+^/Er^3+^, prepared by melt quenching and subsequent heating, were investigated. It was found that, compared with that of the sample singly doped with 0.5Er^3+^, the inte