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Sympathetic Cooling of Molecular Ions in Selected Rotational and Vibrational States Produced by Threshold Photoionization

Tong, Xin and Winney, Alexander H. and Willitsch, Stefan. (2010) Sympathetic Cooling of Molecular Ions in Selected Rotational and Vibrational States Produced by Threshold Photoionization. Physical Review Letters, 105 (14). p. 143001.

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Official URL: http://edoc.unibas.ch/dok/A5841466

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Abstract

We present a new method for the generation of rotationally and vibrationally state-selected, translationally cold molecular ions in ion traps. Our technique is based on the state-selective threshold photoionization of neutral molecules followed by sympathetic cooling of the resulting ions with laser-cooled calcium ions. Using N-2(+) ions as a test system, we achieve <90% selectivity in the preparation of the ground rovibrational level and state lifetimes on the order of 15 minutes limited by collisions with background-gas molecules. The technique can be employed to produce a wide range of apolar and polar molecular ions in the ground and excited rovibrational states. Our approach opens up new perspectives for cold quantum-controlled ion-molecule-collision studies, frequency-metrology experiments with state-selected molecular ions and molecular-ion qubits.
Faculties and Departments:05 Faculty of Science > Departement Chemie > Chemie > Chemische Physik (Willitsch)
UniBasel Contributors:Willitsch, Stefan
Item Type:Article, refereed
Article Subtype:Research Article
Publisher:American Physical Society
ISSN:0031-9007
e-ISSN:1079-7114
Note:Publication type according to Uni Basel Research Database: Journal article
Language:English
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Last Modified:13 Feb 2017 16:31
Deposited On:14 Sep 2012 07:00

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