Inelastic scattering of NCO(X2Π) + He : prototypical rotational state distributions for Hund's case (a) radicals ?

State-resolved cross sections for the inelastic scattering of the linear triatomic radical NCO([tilde X][sup 2]II[sub 3/2]) by He have been measured in a pulsed, crossed-beam apparatus at a collision energy of 3.74 kcal mol[sup [minus]1]. Dramatically different rotational state distributions were fo...

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Veröffentlicht in:	Journal of physical chemistry (1952) 1991-11, Vol.95 (24), p.9630-9633
Hauptverfasser:	MACDONALD, R. G, KOPIN LIU
Format:	Artikel
Sprache:	eng
Schlagworte:	ATOMIC AND MOLECULAR PHYSICS BEAMS CARBON COMPOUNDS COLLIDING BEAMS COUPLING CROSS SECTIONS DATA ELEMENTS ENERGY LEVELS ENERGY SPECTRA Exact sciences and technology EXCITED STATES EXPERIMENTAL DATA FLUIDS GASES HELIUM INELASTIC SCATTERING INFORMATION INTERMEDIATE COUPLING L-S COUPLING Molecular properties and interactions with photons NITROGEN COMPOUNDS NONMETALS NUMERICAL DATA OXYGEN COMPOUNDS Physics RADICALS RARE GASES ROTATIONAL STATES SCATTERING SPECTRA 664300 > Atomic & Molecular Physics-- Collision Phenomena-- (1992-)
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Zusammenfassung:	State-resolved cross sections for the inelastic scattering of the linear triatomic radical NCO([tilde X][sup 2]II[sub 3/2]) by He have been measured in a pulsed, crossed-beam apparatus at a collision energy of 3.74 kcal mol[sup [minus]1]. Dramatically different rotational state distributions were found depending on whether or not the spin-orbit state of NCO was preserved in the collision. It is proposed that the observed different distributions are generic to the inelastic scattering of a Hund's case (a) [sup 2]II radical, arising naturally as a dynamical consequence of the Renner-Teller effect.
ISSN:	0022-3654 1541-5740
DOI:	10.1021/j100177a007