Multi-phonon relaxation of the H− local mode in CaF2

Autor:	J.A. Campbell, J.R. Engholm, H.A. Schwettman, U. Happek, C.P. Davison
Rok vydání:	1998
Předmět:	Phonon Chemistry Relaxation (NMR) Biophysics Analytical chemistry Free-electron laser General Chemistry Condensed Matter Physics Biochemistry Atomic and Molecular Physics and Optics Ion Impurity Picosecond Radiative transfer Atomic physics Saturation (magnetic)
Zdroj:	Journal of Luminescence. :628-631
ISSN:	0022-2313
DOI:	10.1016/s0022-2313(97)00167-1
Popis:	We have investigated the non-radiative relaxation of the substitutional H − local mode ( v = 965 cm −1 ) in CaF 2 . This system is attractive due to its simplicity, the only possible decay mechanism, aside from radiative relaxation, is non-radiative multiphonon decay into host phonons. Saturation experiments were performed at the Stanford Picosecond Free Electron Laser Center, using a pump-probe technique. We find an energy relaxation time T 1 of 45 ps at low temperature. We compare this result with the relaxation of the local mode of an interstitial H − ion next to a Lanthanum impurity ion, and find a much more rapid relaxation time T 1 of 6 ps.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f5eded460e4957d6ae1e9e513dcb4aa4 https://doi.org/10.1016/s0022-2313(97)00167-1 Zobrazit plný text záznamu Full Text from ScienceDirect