Abstract
Intense broadband emission in the visible is observed from crystals of Bi4Ge3O12 under optical and x-ray excitation. From measurements of absorption, reflection, fluorescence, and excitation spectra, the emission is assigned to 3P1 → 1S0 transitions of Bi3+. The Stokes shift is large, [inverted lazy s]14 000 cm−1. The temperature dependences of the fluorescence intensity and lifetime in the range 77–400 °K establish that nonradiative decay becomes significant at temperatures ⪞250°K. Comparison of the properties of Bi4Ge3O12 with those of Bi12GeO20 and other bismuth-activated materials demonstrates the importance of the Stokes shift and the 1S-3P energy difference in determining the luminescence behavior. The use of Bi4Ge3O12 as a laser host crystal for rare-earth and iron group activator ions, and as a scintillator material is discussed briefly.
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Dates
Type | When |
---|---|
Created | 21 years, 6 months ago (Feb. 4, 2004, 12:26 p.m.) |
Deposited | 1 year, 6 months ago (Feb. 2, 2024, 12:11 a.m.) |
Indexed | 1 day, 23 hours ago (Aug. 23, 2025, 9:48 p.m.) |
Issued | 51 years, 8 months ago (Dec. 1, 1973) |
Published | 51 years, 8 months ago (Dec. 1, 1973) |
Published Print | 51 years, 8 months ago (Dec. 1, 1973) |
@article{Weber_1973, title={Luminescence of Bi4 Ge3 O12 : Spectral and decay properties}, volume={44}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1662183}, DOI={10.1063/1.1662183}, number={12}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Weber, M. J. and Monchamp, R. R.}, year={1973}, month=dec, pages={5495–5499} }