title: Vibrational and rotational cooling of NO+ in collisions with He.
abstract: A quantum mechanical investigation of the vibrational and rotational deactivation of NO(+) in collisions with He atoms in the cold and ultracold regime is presented. Ab initio potential energy calculations are carried out at BCCD(T) level and a new global 3D potential energy surface (PES) is obtained by fitting ab initio points within the reproducing kernel Hilbert space method. As a first test of this PES the bound state energies of the (3)He-NO(+) and (4)He-NO(+) complexes are calculated and compared to previous rigid rotor calculations. The efficiency of the vibrational and the rotational cooling of this molecular ion using a buffer gas of helium is then investigated by performing close coupling scattering calculations for collision energy ranging from 10(-6) to 2000 cm(-1). The calculations are performed for the two isotopes (3)He and (4)He and the results are compared to the available experimental data.
authors.affiliation: Institut des Sciences Moléculaires, Université de Bordeaux 1, 351 cours de la Libération, 33405 Talence Cedex, France. t.stoecklin@ism.u-bordeaux1.fr
authors.forename: T
authors.initials: T
authors.lastname: Stoecklin
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authors.initials: A
authors.lastname: Voronin