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Rotationally Inelastic Scattering of Quantum-State-Selected ND3 with Ar

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)5979 - 5987
Number of pages9
JournalJournal of Physical Chemistry A
Volume119
Issue number23
DOIs
DatePublished - 22 Dec 2014

Abstract

Rotationally inelastic scattering of ND3 with Ar is studied at mean collision
energies of 410 and 310 cm−1. In the experimental component of the study, ND3 molecules are prepared by supersonic expansion and subsequent hexapole state selection in the ground electronic and vibrational levels and in the jk±=11− rotational level. A beam of state-selected ND3 molecules is crossed with a beam of Ar, and scattered ND3 molecules are detected in single final j′k′
± quantum states using resonance enhanced multiphoton ionization spectroscopy. State-to-state differential cross sections for rotational-level
changing collisions are obtained by velocity map imaging. The experimental measurements are compared with close-coupling quantum-mechanical scattering calculations performed using an ab initio potential energy surface. The computed DCSs agree well with the experimental measurements, confirming the high quality of the potential energy surface. The angular distributions are dominated by forward scattering for all measured final rotational and vibrational inversion symmetry states. This outcome is in contrast to our recent results for inelastic scattering of ND3 with He, where we observed significant amount of sideways and backward scattering for some final rotational levels of ND3. The differences between He and Ar collision partners are explained by differences in the potential energy surfaces that govern the scattering dynamics.

Additional information

Accepted 16/12/2014

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  • ND3-Ar final revised

    Rights statement: This document is the Accepted Manuscript version of a Published Work that appeared in final form in the Journal of Physical Chemistry A, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see dx.doi.org/10.1021/jp5115042.

    Accepted author manuscript, 1 MB, PDF document

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