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- W2091239684 abstract "The dephasing relaxation of the J=2 Raman-active ensuremath{Vert}kensuremath{Vert}ensuremath{approxeq}0 rotons in solid p-${mathrm{H}}_{2}$ induced by o-${mathrm{H}}_{2}$ impurities is described as elastic scattering of the rotons by these point defects into kensuremath{ne}0 rotons with equal energy. The specific rotational properties of the impurities and the intermolecular interactions between the impurity and the host molecules are not involved in the model calculation: It is argued that the defect can be represented by an empty site in the crystal, leaving the other intermolecular interactions unaltered. The total scattering rate is obtained from a detailed Brillouin zone integration of the golden-rule-type scattering probabilities. The results for the ensuremath{Vert}Mensuremath{Vert}=0 and 1 Raman-active J=2 rotons are very close to the experimental values determined from the linear increase of the dephasing relaxation rates, ${T}_{2}^{mathrm{ensuremath{-}}1}$, as a function of o-${mathrm{H}}_{2}$ concentration. However, the calculated results for the ensuremath{Vert}Mensuremath{Vert}=2 transition are too small by more than an order of magnitude. The origin of this discrepancy is discussed and possible refinements of the calculation are suggested." @default.
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- W2091239684 date "1988-07-15" @default.
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- W2091239684 title "Scattering-model calculation of the impurity-induced dephasing relaxation rates of the Raman-activeJ=2 rotons in solid parahydrogen" @default.
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- W2091239684 doi "https://doi.org/10.1103/physrevb.38.1450" @default.
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