Hyper-Rayleigh light-scattering spectra determined by ab initio collisional hyperpolarizabilities of He-Ne atomic pairs
- Nonlinear Optics Division, Faculty of Physics, Adam Mickiewicz University, 61-614 Poznan (Poland)
- Laboratoire des Proprietes Optiques des Materiaux et Applications, Universite d'Angers, 2 boulevard Lavoisier, 49045 Angers (France)
- Department of Chemistry, University of Patras, GR-26500 Patras (Greece)
The collision-induced (CI) first hyperpolarizability tensor for the He-Ne pair composed of the lightest noble gas elements has been obtained on the grounds of an ab initio method as a function of the interatomic distance R. Collision-induced hyper-Rayleigh (CIHR) spectra scattered in mixtures of such atoms at temperatures of 95 and 295 K are computed in absolute units both quantum mechanically and classically for the frequency shifts up to 1000 cm{sup -1}. The spectral features of the CIHR profiles due to the vector b{sub 1} and septor b{sub 3} parts of the hyperpolarizability tensor are discussed. The quantum character of computed spectra, especially significant at lower temperatures, has been found out. The integrated intensities of the spectra have been evaluated and used as a criterion of the reliability of the computed profiles. The frequency-dependent depolarization ratio of the CIHR spectra was evaluated and discussed. The properties of the resulting HR profiles have been compared with the depolarized CI Rayleigh spectrum of the He-Ne pair.
- OSTI ID:
- 20787107
- Journal Information:
- Physical Review. A, Vol. 73, Issue 4; Other Information: DOI: 10.1103/PhysRevA.73.042708; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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