@article{jacovella_infrared_2016,
	title = {Infrared spectroscopy of molecular ions in selected rotational and spin-orbit states},
	volume = {145},
	issn = {0021-9606, 1089-7690},
	url = {http://scitation.aip.org/content/aip/journal/jcp/145/1/10.1063/1.4954701},
	doi = {10.1063/1.4954701},
	abstract = {First results are presented obtained with an experimental setup developed to record IR spectra of rotationally state-selected ions. The method we use is a state-selective version of a method developed by Schlemmer et al. [Int. J. Mass Spectrom. 185, 589 (1999); J. Chem. Phys. 117, 2068 (2002)] to record IR spectra of ions. Ions are produced in specific rotational levels using mass-analyzed-threshold-ionization spectroscopy. The state-selected ions generated by pulsed-field ionization of Rydberg states of high principal quantum number (n ≈ 200) are extracted toward an octupole ion guide containing a neutral target gas. Prior to entering the octupole, the ions are excited by an IR laser. The target gas is chosen so that only excited ions react to form product ions. These product ions are detected mass selectively as a function of the IR laser wavenumber. To illustrate this method, we present IR spectra of C2H2+ in selected rotational levels of the 2Πu,3/2 and 2Πu,1/2 spin-orbit components of the vibronic ground state.},
	number = {1},
	urldate = {2016-08-18},
	journal = {The Journal of Chemical Physics},
	author = {Jacovella, U. and Agner, J. A. and Schmutz, H. and Deiglmayr, J. and Merkt, F.},
	month = jul,
	year = {2016},
	keywords = {Cold molecules, Precision Measurements},
	pages = {014301},
}

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