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Title

Communication: Observation of homonuclear propensity in collisional relaxation of the 13C12CD2 (v2 = 1) isotopologue of acetylene by stimulated Raman spectroscopy

AuthorsMartínez, Raúl Z. ; Doménech, José Luis ; Bermejo, Dionisio ; Di Lonardo, G.; Fusina, L.
Issue Date1-Oct-2013
AbstractWe report the first experimental observation of homonuclear propensity in collisional relaxation of a polyatomic molecule. A pump-probe stimulated Raman setup is used to pump population to a single rotational level of the v2 = 1 vibrationally excited state in 13C12CD2 and then monitor the redistribution of the rotational population that has taken place after a fixed delay. The Q-branch of the 2ν2–ν2 band shows a pattern of intensity alternation between the even and the odd rotational components, with the greater intensities always corresponding to the rotational levels with the same parity as the one where all the population was initially deposited. The effect can be explained by the existence of a propensity rule that favors collisional relaxation between rovibrational levels of the same parity. © 2011 American Institute of Physics.
Description4 p.: gráf.
Publisher version (URL)http://dx.doi.org/10.1063/1.3602916
URIhttp://hdl.handle.net/10261/83045
DOI10.1063/1.3602916
ISSN0021-9606
Appears in Collections:(CFMAC-IEM) Artículos
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