In recent years. high-resolution photoelectron spectroscopy and ab initio calculations have considerably revised and enlarged the understanding of the electronic structure of the NO+ ion. Based on these results. new potential energy curves for the electronic states of NO+ below 24 eV have been constructed and are given here. RKR potentials were calculated from new molecular constants for the eight experimentally well-defined states. For the other states. the main features of the potentials were estimated from theoretical calculations and from isoelectronic analogies. A brief review is given of the information on which each potential energy curve is based.
State-to-state dynamics of the Cl + CH 3 OH → HCl + CH 2 OH reactionWe have applied the experimental technique of core extraction ͓W. R. Simpson et al., J. Chem. Phys. 103, 7299 ͑1995͔͒ combined with resonance-enhanced multiphoton ionization ͑REMPI͒ with a polarized laser beam to probe the angular-momentum alignment of the HCl product of the reaction of Cl with vibrationally excited CH 4 ( 3 ϭ1). The core extraction method permits us to distinguish products scattered in different directions in the center-of-mass frame, and thus we are able to determine the rotational alignment for various product scattering angles for individual HCl(vЈ,JЈ) quantum states ͑a state-resolved three-vector correlation͒. For the forward-scattered HCl͑vЈϭ1, JЈϭ1͒ we observe a large positive rotational alignment. This positive velocity-angular-momentum correlation is interpreted to be the result of the angular momentum of the HCl product being directed in the plane perpendicular to the line-of-centers force in a simple hard-sphere scattering model.
Articles you may be interested inOn the mechanism of C60 thin film laserinduced desorption Discharge flowtube studies of O(3 P)+N2H4 reaction: The rate coefficient values over the temperature range 252-423 K and the OH(X 2Π) product yield at 298 K Resonant laser ionization of thorium using continuous thermal heating and pulsed laser evaporation AIP Conf.Laser desorption of aniline-d7 from a single-crystal surface ͑0001͒ of sapphire ͑Al 2 O 3 ͒ at a heating rate on the order of 10 8 K/s was studied using pulsed infrared laser radiation for desorption and resonance enhanced multiphoton ionization ͑REMPI͒ for detection of the desorbed aniline molecules. On the basis of single-vibronic-level fluorescence ͑SVLF͒ spectra we unambigiously assign the 10b transition. REMPI spectroscopy provides vibrational temperatures and therefore describes the internal energy distribution, whereas the time-of-flight ͑TOF͒ profiles provide translational temperatures. All results are consistent with a thermal mechanism for desorption, i.e., pulsed heating of the sapphire surface on the nanosecond time scale leads to thermal desorption and rapid thermalization of the escaping molecules.
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