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Inelastic intermolecular exchange of vibrational quanta and relaxation of vibrationally excited states in binary solid systems

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Abstract

The processes of molecular relaxation in the binary nitrate–perchlorate solid systems LiNO3–LiClO4, NaNO3–NaClO4, and KNO3–KClO4 have been investigated using Raman spectroscopy. It has been found that the relaxation time of the ν1(A) vibration of the NO3 - anion in the binary solid system is shorter than that in the pure metal nitrates. It has been shown that an increase in the relaxation rate is caused by the existence of an additional mechanism of relaxation of vibrationally excited states of the nitrate ion in the system. This mechanism is associated with the excitation of a vibration of another anion (ClO4 -), as well as with the “creation” of a lattice phonon. It has been established that the condition for the realization of the relaxation mechanism is that the difference between the frequencies of the aforementioned vibrations should correspond to the range of sufficiently high densities of states of the phonon spectrum.

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Authors and Affiliations

  1. Amirkhanov Institute of Physics, Dagestan Scientific Centre, Russian Academy of Sciences, ul. Yagarskogo 94, Makhachkala, Republic of Dagestan, 367003, Russia

    A. R. Aliev, I. R. Akhmedov, M. G. Kakagasanov, Z. A. Aliev & M. M. Gafurov

  2. Dagestan State University, ul. Gadzhieva 43a, Makhachkala, Republic of Dagestan, 367000, Russia

    A. R. Aliev & K. Sh. Rabadanov

  3. Analytical Center of Collective Use, Dagestan Scientific Centre, Russian Academy of Sciences, ul. Gadzhieva 45, Makhachkala, Republic of Dagestan, 367001, Russia

    I. R. Akhmedov, M. G. Kakagasanov, M. M. Gafurov, K. Sh. Rabadanov & A. M. Amirov

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  1. A. R. Aliev
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  2. I. R. Akhmedov
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  3. M. G. Kakagasanov
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  4. Z. A. Aliev
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  5. M. M. Gafurov
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  6. K. Sh. Rabadanov
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  7. A. M. Amirov
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Correspondence to A. R. Aliev.

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Original Russian Text © A.R. Aliev, I.R. Akhmedov, M.G. Kakagasanov, Z.A. Aliev, M.M. Gafurov, K.Sh. Rabadanov, A.M. Amirov, 2017, published in Fizika Tverdogo Tela, 2017, Vol. 59, No. 4, pp. 736–740.

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Aliev, A.R., Akhmedov, I.R., Kakagasanov, M.G. et al. Inelastic intermolecular exchange of vibrational quanta and relaxation of vibrationally excited states in binary solid systems. Phys. Solid State 59, 752–757 (2017). https://doi.org/10.1134/S1063783417040035

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  • DOI: https://doi.org/10.1134/S1063783417040035

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