Quantum calculations of H2-H2 collisions in the cold and ultracols regimes

ORAL

Abstract

Quantum scattering calculations of H$_2$ + H$_2$, both ortho-para and ortho-ortho cases, and HD + H$_2$ have been carried out at cold and ultracold temperatures using ab inito potential energy surfaces for the H$_4$ system developed by Hinde and Boothroyd and coworkers. The calculations were performed in the rigid rotor approximation using the MOLSCAT code as well as the vibrating rotor scheme implemented in the TwoBC code [1]. Elastic, inelastic and state-to-state cross sections obtained from our calculations are compared with available theoretical and experimental results. We also report preliminary results of differential cross sections for para-H$_2$ + para-H$_2$ collisions. \\[4pt] [1] R. V. Krems, TwoBC-quantum scattering program, University of Britsh Columbia, Vancouver, Canada (2006).

*This work was supported by NSF grants PHY-0855470(N.B.), AST-0607524(S.L.), and AST-0607733(P.C.S.)

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Authors

  • Samantha Fonseca dos Santos

    • University of Nevada Las Vegas

  • Stephen Leep

    • University of Nevada Las Vegas

  • Balakrishnan Naduvalath

    • University of Nevada Las Vegas

  • Goulven Quemener

    • JILA

  • Robert Forrey

    • Penn State University, Berks Campus
    • Penn State, Berks Campus
    • Pennsylvania State University
    • Penn State University

  • Phillip Stancil

    • Dept. of Physics \& Astronomy, University of Georgia, Athens, GA 30602, USA
    • University of Georgia