caa a22 4500 378942468 CHVBK 20180305123656.0 cr unu---uuuuu 161128e20040301xx s 000 0 eng 10.1524/zpch.218.3.293.26492 doi (NATIONALLICENCE)gruyter-10.1524/zpch.218.3.293.26492 El-Kader M. S. A. Lineshape and Moment Analysis in Isotropic and Anisotropic Interaction-Induced Light Scattering Spectra of Gaseous Helium [Elektronische Daten] [M. S. A. El-Kader] Calibrated Raman spectra of the helium gas diatom at room temperature (294.5K) have recently been measured over a wide range of intensities, with polarizations of the incident beam parallel and perpendicular to the direction of observation. From the resulting spectra, the isotropic and anisotropic components are separated for the helium diatom. For direct comparison with the measurements, quantum mechanical lineshapes are computed using recent model of the interatomic potential and models of the diatom polarizability tensor invariants as input. New empirical trace and anisotropy parameters, consistent with the spectroscopic measurements, are thus obtained for the helium gas. We compare these where possible with the existing computations based on classical physics, utilizing the first few even moments of the isotropic and anisotropic spectra. Good agreement with ab initio results in the literature is obtained and profiles calculated with these models are in excellent agreement with experiments. © 2004 Oldenbourg Wissenschaftsverlag GmbH Thermodynamics & statistical physics nationallicence Laboratory techniques, experiments nationallicence Physical chemistry nationallicence Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/3/2004(2004-03-01), 293-310 0942-9352 218:3/2004<293 2004 218 zpch https://doi.org/10.1524/zpch.218.3.293.26492 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/zpch.218.3.293.26492 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- El-Kader M. S. A. NATIONALLICENCE 773 0- Zeitschrift für Physikalische Chemie/International journal of research in physical chemistry and chemical physics Oldenbourg Wissenschaftsverlag GmbH 218/3/2004(2004-03-01), 293-310 0942-9352 218:3/2004<293 2004 218 zpch CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter