9 February 1995 Thermalization of the triplet excitons and quenching of the phosphorescence in NaNO2 crystal
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Proceedings Volume 2362, International Conference on Excitonic Processes in Condensed Matter; (1995) https://doi.org/10.1117/12.200955
Event: Excitonic Processes in Condensed Matter: International Conference, 1994, Darwin, Australia
Abstract
Triplet absorption and phosphorescence spectra of NaNO2 crystal have been studied in the temperature range of 1.8 approximately 40 K by means of high resolution spectroscopy. Profiles of the absorption and phosphorescence phonon sidebands of the 0 - 0 line show that the triplet excitons are not in thermal equilibrium at 2 K but approach to the equilibrium above approximately 10 K. The intensity and decay time of the phosphorescence were found to decrease drastically in the temperature range of 3 approximately 6 K. The quenching of the phosphorescence is discussed in terms of spin-lattice relaxation caused by two-phonon processes. The relation between the thermalization of excitons and quenching of the phosphorescence are also discussed.
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Osamu Ohta, Osamu Ohta, Ariyuki Kato, Ariyuki Kato, Riso Kato, Riso Kato, } "Thermalization of the triplet excitons and quenching of the phosphorescence in NaNO2 crystal", Proc. SPIE 2362, International Conference on Excitonic Processes in Condensed Matter, (9 February 1995); doi: 10.1117/12.200955; https://doi.org/10.1117/12.200955
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