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Collisions in a dual-species magneto-optical trap of molecules and atoms

Jurgilas, S.; Chakraborty, A.; Rich, C.J.H.; Sauer, B.E.; Frye, Matthew D.; Hutson, Jeremy M.; Tarbutt, MR

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S. Jurgilas

A. Chakraborty

C.J.H. Rich

B.E. Sauer

MR Tarbutt


We study inelastic collisions between CaF molecules and 87Rb atoms in a dual-species magneto-optical trap. The presence of atoms increases the loss rate of molecules from the trap. By measuring the loss rates and density distributions, we determine a collisional loss rate coefficient k2 = (1.43 ± 0.29) × 10−10 cm3 s−1 at a temperature of 2.4 mK. We show that this is not substantially changed by light-induced collisions or by varying the populations of excited-state atoms and molecules. The observed loss rate is close to the universal rate expected in the presence of fast loss at short range, and can be explained by rotation-changing collisions in the ground electronic state.


Jurgilas, S., Chakraborty, A., Rich, C., Sauer, B., Frye, M. D., Hutson, J. M., & Tarbutt, M. (2021). Collisions in a dual-species magneto-optical trap of molecules and atoms. New Journal of Physics, 23(7), Article 075004.

Journal Article Type Article
Acceptance Date Jun 18, 2021
Online Publication Date Jul 8, 2021
Publication Date 2021-07
Deposit Date Oct 7, 2021
Publicly Available Date Nov 26, 2021
Journal New Journal of Physics
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 23
Issue 7
Article Number 075004
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Copyright Statement
Advance online version Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

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