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  Interpretation of level-anticrossing phenomena in phosphorescence and optical nuclear polarization in organic crystals

Dinse, K., Colpa, J. P., Deimling, M., Rowat, J., & Hausser, K. H. (1982). Interpretation of level-anticrossing phenomena in phosphorescence and optical nuclear polarization in organic crystals. Molecular Physics, 46(5), 917-939. doi:10.1080/00268978200101681.

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Dinse, Klaus−Peter1, Author           
Colpa, J. P.1, Author           
Deimling, Michael1, Author           
Rowat, J.1, Author           
Hausser, Karl H.2, Author           
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1Max Planck Institute for Medical Research, Max Planck Society, ou_1125545              
2Department of Molecular Physics, Max Planck Institute for Medical Research, Max Planck Society, ou_1497705              

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 Abstract: Level-anticrossing (LAC) phenomena in electronic states of molecules in organic crystals are described with a density matrix formalism. A condition for the observability of LAC signals in phosphorescence and ONP is derived. The validity of these predictions is tested at quadrupole satellite positions in the LAC spectra. As a consequence of the full density matrix treatment, off-diagonal damping terms Γ mn = T 2 -1(mn) are introduced. These turned out to be essential for the interpretation of the vanishing of experimentally observed LAC signals at higher order satellite positions. If T 2 equals the lifetime τ of the triplet state, earlier predictions based on kinetic arguments evolve as a limiting case of the present theory. The quadrupole satellite signals can be described properly by the density matrix formalism and there is no need for the introduction of an additional cross-relaxation mechanism.

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Language(s): eng - English
 Dates: 1981-09-251982-02-012006-08-111982
 Publication Status: Issued
 Pages: 24
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1080/00268978200101681
 Degree: -

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Title: Molecular Physics
  Other : Mol. Phys.
Source Genre: Journal
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Publ. Info: London : Taylor & Francis
Pages: - Volume / Issue: 46 (5) Sequence Number: - Start / End Page: 917 - 939 Identifier: ISSN: 0026-8976
CoNE: https://pure.mpg.de/cone/journals/resource/954925264211