Excitonic mechanisms of inelastic radiation-induced processes in rare-gas solids

Ogurtsov, A. N.; Savchenko, E. V.; Vielhauer, S.; Zimmerer, G.

doi:10.1016/j.jlumin.2004.09.003

Cited by 4 publications

(2 citation statements)

References 15 publications

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“…Indeed, the effect of the cage distortion under electronic excitation was found in solid rare gases, see e.g. [41] and references therein. Interesting research which is relevant to the present discussion was also published earlier, [42].…”

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confidence: 99%

Inertial rotation and matrix interaction effects on the EPR spectra of methyl radicals isolated in ‘inert’ cryogenic matrices

Benetis

Dmitriev

2009

J. Phys.: Condens. Matter

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The CW-EPR lineshapes of methyl and small methyl-like radicals trapped in noble gas matrices at liquid He temperatures are substantially different from the expected classical EPR spectra. At low temperatures they show small or negligible anisotropy in studies using different experimental techniques and have a temperature dependence that differs from systems whose motional dynamics is diffusion controlled. At liquid He temperatures, before the Boltzmann statistics take over in the classical high temperature realm, the spectral intensities are dominated by quantum statistics. These properties, which were obtained experimentally at temperatures about 5 K and lower, and up to about 20 K, can be attributed to quantum effects of inertial rotary motion and its coupling to the nuclear spin of the radical. Methyl-like radicals have nuclear-exchange symmetry and contain the lightest possible isotopes, protons, and deuterons. In the ideal case of absent radical-matrix interaction, the methyl rotation about the central heavier carbon atom guaranties minimal moments of inertia. However, the theoretical interpretation of the above effects and other related quantum effects, as well as recognition of the important physics which lead to them, is not a simple matter. The literature accumulated on the subject over the years is successful but contains several unresolved questions. Recently obtained spectra of methyl radicals in Kr, N(2) and CO matrices, which are less inert than the smaller noble gas Ar, were shown to exhibit greater, but certainly slight, overall anisotropic spectral features while in earlier experimental studies the anisotropy was practically absent. Even gases of smaller radii such as Ne and H(2) at liquid He temperatures show interesting differences as hosts of methyl radicals compared to Ar. Investigation of other possible causes of this difference, not excluding the experimentally controlled ones related to the sample preparation and the MW power saturation of the CW-EPR measurement, were conducted in this work.

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confidence: 99%

Inertial rotation and matrix interaction effects on the EPR spectra of methyl radicals isolated in ‘inert’ cryogenic matrices

Benetis

Dmitriev

2009

J. Phys.: Condens. Matter

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“…Mutual interplay and evolution in time of the intensity and shape of different luminescence bands reveal the transformation of RGC crystal properties under external effects [1][2][3][4][5]. On the other hand, the high sensitivity of luminescence spectra to sample growing and excitation conditions pose a real problem for comparison of data from different samples [8][9][10].…”

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confidence: 99%

Kinetic study of inelastic radiation-induced processes in rare-gas cryocrystals

Ogurtsov

Masalitina

Bliznjuk

2007

Low Temperature Physics

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The application of synchrotron radiation and in particular X-ray absorption spectroscopy to matrix isolated species

Young

2014

Coordination Chemistry Reviews

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This review provides comprehensive coverage of the application of X-ray absorption spectroscopy (XAS, XAFS, EXAFS, XANES) to matrix isolated species. As X-ray absorption spectroscopy provides structural data without the need for long range order it has been applied to a large number of systems to yield unique structural data about both the matrix isolated species, and their interactions with the matrix host. To put the work into perspective there is a tutorial introduction to the theoretical background of X-ray absorption spectroscopy, data content, processing and analysis. In addition there is brief coverage of the use of other synchrotron radiation techniques for the study of matrix isolated species, and a consideration of future perspectives.

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Excitonic mechanisms of inelastic radiation-induced processes in rare-gas solids

Cited by 4 publications

References 15 publications

Inertial rotation and matrix interaction effects on the EPR spectra of methyl radicals isolated in ‘inert’ cryogenic matrices

Inertial rotation and matrix interaction effects on the EPR spectra of methyl radicals isolated in ‘inert’ cryogenic matrices

Kinetic study of inelastic radiation-induced processes in rare-gas cryocrystals

The application of synchrotron radiation and in particular X-ray absorption spectroscopy to matrix isolated species

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