Bulletin of the American Physical Society
54th Annual Meeting of the APS Division of Atomic, Molecular and Optical Physics
Volume 68, Number 7
Monday–Friday, June 5–9, 2023; Spokane, Washington
Session F01: Poster Session I (4:00pm-6:00pm PT)
4:00 PM,
Tuesday, June 6, 2023
Room: Exhibit Hall C
Abstract: F01.00106 : Hyperfine and Zeeman interactions in ultracold collisions of molecular hydrogen with Li atoms*
Presenter:
Hubert Jozwiak
(Nicolaus Copernicus University in Torun)
Authors:
Hubert Jozwiak
(Nicolaus Copernicus University in Torun)
Timur V Tscherbul
(University of Nevada, Reno)
Piotr Wcislo
(Nicolaus Copernicus University in Torun)
We present a rigorous quantum scattering study of the effects of hyperfine and Zeeman interactions on cold Li-H2 collisions in the presence of an external magnetic field using a recent ab initio potential energy surface. We obtain a favorable ratio of the cross sections for elastic to inelastic collisions for the low-field-seeking Zeeman states of H2. We discuss the importance of the spin-dependent Li-H2 interaction, the role of collisions conserving the projection of the total nuclear spin of H2, and the implications for sympathetic cooling of molecular hydrogen by lithium in a magnetic trap.
*The research is financed from the budgetary funds on science projected for 2019-2023 as a research project under the "Diamentowy Grant" program. P.W. is supported by the National Science Centre in Poland, Project No. 2019/35/B/ST2/01118. The research is a part of the program of the National Laboratory FAMO in Torun, Poland. Calculations have been partially carried out using resources provided by the Wroclaw Centre for Networking and Supercomputing [60], Grant No. 546. We gratefully acknowledge Poland's high-performance computing infrastructure PLGrid (HPC Centers: ACK Cyfronet AGH, PCSS, CI TASK) for providing computer facilities and support within computational Grant No. PLG/2022/015576.
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