Universität zu Köln

Bruenken, Sandra, Kluge, Lars, Stoffels, Alexander, Perez-Rios, Jesus and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2017). Rotational state-dependent attachment of He atoms to cold molecular ions: An action spectroscopic scheme for rotational spectroscopy. J. Mol. Spectrosc., 332. S. 67 - 79. SAN DIEGO: ACADEMIC PRESS INC ELSEVIER SCIENCE. ISSN 1096-083X

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Abstract

We present a kinetics model description of a newly developed action spectroscopic method for rotational spectroscopy based on rotational state-dependent three-body attachment of He atoms to cold molecular ions stored in a cryogenic 22-pole ion trap. The model results from numerical simulations and an approximate analytical expression are compared to measurements of the J = 1-0 rotational transition of CD+, for which we obtain a refined transition frequency of 453.5218509(7) GHz. From the analysis of the spectroscopic data recorded at varying experimental conditions, e.g. over a wide range of He number densities and excitation powers, we deduce that the ternary rate coefficient in the first excited rotational state of CD+ is reduced to (55 +/- 5)% of the rotational ground state value. This decrease in the rate coefficient can be rationalized as an increase of the redissociation probability in the ternary collision process. A summary of rotational spectroscopy measurements of other molecular ions using the new method will be given, and its general applicability is discussed. (C) 2016 Elsevier Inc. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bruenken, Sandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Kluge, Lars UNSPECIFIED UNSPECIFIED UNSPECIFIED Stoffels, Alexander UNSPECIFIED UNSPECIFIED UNSPECIFIED Perez-Rios, Jesus UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlemmer, Stephan UNSPECIFIED orcid.org/0000-0002-1421-7281 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-241743
DOI:	10.1016/j.jms.2016.10.018
Journal or Publication Title:	J. Mol. Spectrosc.
Volume:	332
Page Range:	S. 67 - 79
Date:	2017
Publisher:	ACADEMIC PRESS INC ELSEVIER SCIENCE
Place of Publication:	SAN DIEGO
ISSN:	1096-083X
Language:	English
Faculty:	Faculty of Mathematics and Natural Sciences
Divisions:	Faculty of Mathematics and Natural Sciences > Department of Physics > Institute of Physics I
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language REST FREQUENCIES; COLOGNE DATABASE; GAS; TEMPERATURE; TRANSITIONS; COLLISIONS; SPECTRA; TRAP; H2D+; HCO+ Multiple languages Physics, Atomic, Molecular & Chemical; Spectroscopy Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/24174