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Poster Session

Poster Session III

4:00 pm – 6:00 pm, Thursday June 19 Session S00 Oregon Convention Center:, Exhibit Hall E
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Cold collisions of highly vibrationally excited and aligned D2 with Ne

Poster 16
Presenter: Bikramaditya Mandal (University of Nevada, Las Vegas)
Authors: Cristina Sanz-Sanz (Departamento de Quımica Fısica Aplicada, Modulo 14, Universidad Autonoma de Madrid, Madrid 28049, Spain), Pablo Jambrina (Departamento de Quimica Fisica, University of Salamanca, Salamanca 37008, Spain), F. Aoiz (Departamento de Quimica Fisica, Universidad Complutense, Madrid 28040, Spain), Balakrishnan Naduvalath (University of Nevada, Las Vegas)

Resonant scattering of highly vibrationally excited and aligned D2 in cold collisions with Ne has recently been probed experimentally using the Stark-induced adiabatic Raman passage (SARP) technique [1]. A partial-wave analysis and numerical fitting of the experimental data for Δj=-2 transition in D2(v=4, j=2) + Ne collisions attributed the measured angular distribution to an l=2 shape resonance near E/kB=1 kelvin. Here, we report computation of a new potential energy surface for the Ne-H2 interaction suitable for the study of collisions between highly vibrationally excited H2/D2 with Ne as well as quantum scattering calculations of stereodynamics of D2(v=4, j=2) + Ne collisions probing Δj=-2 rotational transitions in D2. Our results show that collisions are dominated by a strong l=5 resonance near 3 K and a weaker l=6 resonance near 8 K. Our calculations do not support the claim that the measured angular distributions are dominated by a single l=2 partial-wave resonance near 1 K.

[1] W. E. Perreault, H. Zhou, N. Mukherjee, and R. N. Zare, Resonant cold scattering of highly vibrationally excited D2 with Ne, J. Chem. Phys. 157, 144301 (2022).

Funding acknowledgement

This work is supported in part by NSF grant No. PHY-2409497 (B.N.) and DoD MURI grant No. W911NF-19-1-0283 (B.N.) from Army Research Office.

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