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1996 | 90 | 1 | 161-168
Article title

Cross Relaxation and Energy Transfer in Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6}

Content
Title variants
Languages of publication
EN
Abstracts
EN
Luminescence decay curves have been measured for the Sm^{3+} ^{4}G_{5/2} → ^{6}H_{7/2} emission in the cubic crystal Cs_{2}NaSm_{x}Eu_{y}Y_{1-x-y}Cl_{6} (x = 0.005 to x = 1, y = 0 to y = 0.99) over the temperature range 10 K to 300 K using pulsed laser excitation into the ^{4}G_{5/2} state of Sm^{3+}. The luminescence from the ^{4}G_{5/2} state of Sm^{3+} is strongly quenched by both, cross relaxation to nearest-neighbour Sm^{3+} ions and energy transfer to the ^{5}D_{0} state of Eu^{3+}. We interpret these processes in terms of a recently developed discrete shell model. The dependence of energy transfer from the Sm^{3+} donor ion to Eu^{3+} acceptor ions on y is readily studied and modelled. The temperature dependence shows that the cross relaxation occurs mainly by electric dipole vibronic-electric dipole vibronic interaction while in the energy-transfer process magnetic dipole allowed electronic contributions are also involved.
Keywords
EN
Publisher

Year
Volume
90
Issue
1
Pages
161-168
Physical description
Dates
published
1996-07
Contributors
author
  • Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, 8010 Graz, Austria
author
  • Institut für Physikalische und Theoretische Chemie, Technische Universität Graz, 8010 Graz, Austria
author
  • Laser Laboratory, Department of Chemistry, Birkbeck College, 29, Gordon Square, London WC1H 0PP, U.K.
References
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv90z116kz
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