Low Temperature Physics: 36, 439 (2010); https://doi.org/10.1063/1.3432261 (9 pages)
Физика Низких Температур: Том 36, Выпуск 5 (Май 2010), c. 549-558    ( к оглавлению , назад )

Study of the cluster formation in low-temperature systems. Spectral manifestation of resonance dipole-dipole interactions between nondipole polyatomic molecules

A.N. Cherevatova, V.N. Bocharov, T.D. Kolomiitsova, D.N. Shchepkin, and K.G. Tokhadze

Physical Faculty, St. Petersburg State University, Peterhof, St. Petersburg 198504, Russia
E-mail: K.Tokhadze@molsp.phys.spbu.ru

Received January 5, 2010

Аннотация

Resonance dipole–dipole interactions are shown to strongly manifest themselves in fundamental and overtone band shapes of low-temperature systems, consisting of polar and nonpolar molecules as well with a relatively large first derivatives (P′ > 0.3 D) of the dipole moment. The rough model on the basis of the interaction between two non-degenerate, doubly degenerate, and triply degenerate oscillators was developed to study pairs of interacting molecules and clusters in low-temperature condensed systems. The concentration dependences of second- and third-order spectral band moments permitted the number of molecules in clusters to be estimated.

PACS: 78.30.–j Infrared and Raman spectra;
PACS: 33.20.–t Molecular spectra;
PACS: 36.40.Mr Spectroscopy and geometrical structure of clusters.

Ключевые слова: spectral moments, dipole–dipole interactions, clusters, low-temperature molecular systems.