Universität zu Köln

Asvany, Oskar, Yamada, Koichi M. T., Bruenken, Sandra, Potapov, Alexey and Schlemmer, Stephan ORCID: 0000-0002-1421-7281 (2015). Experimental ground-state combination differences of CH5+. Science, 347 (6228). S. 1346 - 1350. WASHINGTON: AMER ASSOC ADVANCEMENT SCIENCE. ISSN 1095-9203

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Abstract

Protonation of methane (CH4), a rather rigid molecule well described by quantum mechanics, produces CH5+, a prototypical floppy molecule that has eluded definitive spectroscopic description. Experimental measurement of high-resolution spectra of pure CH5+ samples poses a formidable challenge. By applying two types of action spectroscopy predicated on photoinduced reaction with CO2 and photoinhibition of helium cluster growth, we obtained low-temperature, high-resolution spectra of mass-selected CH5+. On the basis of the very high accuracy of the line positions, we determined a spectrum of combination differences. Analysis of this spectrum enabled derivation of equally accurate ground state-level schemes of the corresponding nuclear spin isomers of CH5+, as well as tentative quantum number assignment of this enfant terrible of molecular spectroscopy.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Asvany, Oskar UNSPECIFIED UNSPECIFIED UNSPECIFIED Yamada, Koichi M. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Bruenken, Sandra UNSPECIFIED UNSPECIFIED UNSPECIFIED Potapov, Alexey UNSPECIFIED UNSPECIFIED UNSPECIFIED Schlemmer, Stephan UNSPECIFIED orcid.org/0000-0002-1421-7281 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-409690
DOI:	10.1126/science.aaa3304
Journal or Publication Title:	Science
Volume:	347
Number:	6228
Page Range:	S. 1346 - 1350
Date:	2015
Publisher:	AMER ASSOC ADVANCEMENT SCIENCE
Place of Publication:	WASHINGTON
ISSN:	1095-9203
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 INFRARED-SPECTRUM Multiple languages Multidisciplinary Sciences Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/40969