Collisional excitation of interstellar PO(X2Π) by He: new ab initio potential energy surfaces and scattering calculations

Literature Information

Publication Date 2017-09-25
DOI 10.1039/C7CP05605B
Impact Factor 3.676
Authors

François Lique, Izaskun Jiménez-Serra, Serena Viti, Sarantos Marinakis


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Abstract

We present the first ab initio potential energy surfaces (PESs) for the PO(X2Π)–He van der Waals system. The PESs were obtained using the open-shell partially spin-restricted coupled cluster approach with single, double and perturbative triple excitations [UCCSD(T)]. The augmented correlation-consistent polarized valence triple-zeta (aug-cc-pVTZ) basis set was employed supplemented by mid-bond functions. Integral and differential cross sections for the rotational excitation in PO–He collisions were calculated using the new PES and compared with results in similar systems. Finally, our work presents the first hyperfine-resolved cross sections for this system that are needed for accurate modelling in astrophysical environments.

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Front/Back Matter

DOI: 10.1039/C8OB90148A

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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