Abstract
We apply near-threshold laser photodetachment to characterize the rotational quantum level distribution of ions stored in the cryogenic ion-beam storage ring DESIREE at Stockholm University. We find that the stored ions relax to a rotational temperature of with of the ions in the rotational ground state. This is consistent with the storage ring temperature of as measured with eight silicon diodes but in contrast to all earlier studies in cryogenic traps and rings where the rotational temperatures were always much higher than those of the storage devices at their lowest temperatures. Furthermore, we actively modify the rotational distribution through selective photodetachment to produce an beam where of approximately one million stored ions are in the rotational ground state. We measure the intrinsic lifetime of the rotational level to be .
- Received 23 May 2017
DOI:https://doi.org/10.1103/PhysRevLett.119.073001
© 2017 American Physical Society
Physics Subject Headings (PhySH)
Erratum
Erratum: Rotationally Cold Ions in the Cryogenic Electrostatic Ion-Beam Storage Ring DESIREE [Phys. Rev. Lett. 119, 073001 (2017)]
H. T. Schmidt, G. Eklund, K. C. Chartkunchand, E. K. Anderson, M. Kamińska, N. de Ruette, R. D. Thomas, M. K. Kristiansson, M. Gatchell, P. Reinhed, S. Rosén, A. Simonsson, A. Källberg, P. Löfgren, S. Mannervik, H. Zettergren, and H. Cederquist
Phys. Rev. Lett. 121, 079901 (2018)
Focus
The Coolest Molecular Ion Beams
Published 14 August 2017
Two research teams have created the coldest molecular ion beams ever, putting molecules in their ground states of rotation and providing improved experimental stand-ins for interstellar gas clouds.
See more in Physics