Intrinsic luminescence excitation spectrum of CaF2
- 14 September 1976
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 9 (17) , L479-L481
- https://doi.org/10.1088/0022-3719/9/17/008
Abstract
The intrinsic luminescence excitation spectrum of CaF2 has been measured between 8 and 50 eV. The luminescence is due to the recombination of self-trapped excitons. The spectrum is interpreted in the light of recent work on alkali halides and there is evidence of double electron-hole pair creation by scattering at photon energies near to twice the band gap. There is also a reflection-loss enhancement mechanism probably due to a surface effect, leading to conclusions in the Ca2+ core excitons.Keywords
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