Please use this identifier to cite or link to this item: doi:10.22028/D291-24076
Title: Optically detected NMR and ENDOR [electron nuclear double resonance] with F center pairs in KCI
Author(s): Schnegg, P. A.
Jaccard, C.
Aegerter, Michel A.
Language: English
Year of Publication: 1973
OPUS Source: Physics letters / A. - 42. 1973, 5, S. 369-370
SWD key words: ENDOR
Magnetische Kernresonanz
DDC notations: 500 Science
Publikation type: Journal Article
Abstract: F centers in KCl crystals, paired by bleaching near room temp. and excited by F-band light, experience an exchange interaction favoring a nonradiative deexcitation. In a magnetic field at 10°K, the luminescent intensity showed EPR, ENDOR, and NMR, from changes of the spin populations induced by microwave and radio-frequency fields. When excited with F light at 10°K, these crystals showed a luminescence which decreased with magnetic field. With applied microwaves in the X band, the EPR in the ground state was detected optically as an increase of the luminescence with a g-factor of 2.001 and a full width at half-max. of 64 G, and a long relaxation time, of 10-3-10-1 sec, depending upon the incident light intensity. ENDOR yielded optical signals of the same sign and order of magnitude as the EPR signal. When the microwave power was turned off, the luminescence displayed as a function of the radio frequency the same spectrum (pure NMR).
Link to this record: urn:nbn:de:bsz:291-scidok-22223
Date of registration: 14-Jul-2009
Faculty: SE - Sonstige Einrichtungen
Department: SE - INM Leibniz-Institut für Neue Materialien
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