Deceleration and Trapping of SrF Molecules

P. Aggarwal, Y. Yin, K. Esajas, H. L. Bethlem, A. Boeschoten, A. Borschevsky, S. Hoekstra, K. Jungmann, V. R. Marshall, T. B. Meijknecht, M. C. Mooij, R. G.E. Timmermans, A. Touwen, W. Ubachs, L. Willmann

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We report on the electrostatic trapping of neutral SrF molecules. The molecules are captured from a cryogenic buffer-gas beam source into the moving traps of a 4.5-m-long traveling-wave Stark decelerator. The SrF molecules in state are brought to rest as the velocity of the moving traps is gradually reduced from to zero. The molecules are held for up to 50 ms in multiple electric traps of the decelerator. The trapped packets have a volume (FWHM) of and a velocity spread of , which corresponds to a temperature of 60(20) mK. Our result demonstrates a factor 3 increase in the molecular mass that has been Stark decelerated and trapped. Heavy molecules () offer a highly increased sensitivity to probe physics beyond the standard model. This work significantly extends the species of neutral molecules of which slow beams can be created for collision studies, precision measurement, and trapping experiments.

Original languageEnglish
Article number173201
Pages (from-to)1-7
Number of pages7
JournalPhysical review letters
Issue number17
Early online date21 Oct 2021
Publication statusPublished - 22 Oct 2021

Bibliographical note

Funding Information:
The consortium receives program funding (EEDM-166) from the Netherlands Organisation for Scientific Research (NWO). We acknowledge support from Mike Tarbutt and Stefan Truppe in the design and construction of the cryogenic source. We thank Leo Huisman for technical assistance to the experiment.

Publisher Copyright:
© 2021 American Physical Society


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