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Multi-resonance effects within a single chirp in broadband rotational spectroscopy: The rapid adiabatic passage regime for benzonitrile

MPG-Autoren
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Schmitz,  David
Division Prof. Dr. Joachim H. Ullrich, MPI for Nuclear Physics, Max Planck Societ;
International Max Planck Research School for Ultrafast Imaging & Structural Dynamics (IMPRS-UFAST), Max Planck Institute for the Structure and Dynamics of Matter, Max Planck Society;
Center for Free-Electron Laser Science, Notkestrasse 85, 22607 Hamburg, Germany;

Externe Ressourcen

http://dx.doi.org/10.1016/j.jms.2012.08.001
(Verlagsversion)

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Zitation

Schmitz, D., Shubert, V. A., Betz, T., & Schnell, M. (2012). Multi-resonance effects within a single chirp in broadband rotational spectroscopy: The rapid adiabatic passage regime for benzonitrile. Journal of Molecular Spectroscopy, 280, 77-84. doi:10.1016/j.jms.2012.08.001.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002A-DBE0-E
Zusammenfassung
We report here pronounced, stepwise multi-resonance excitations in benzonitrile arising from a single 1 μs broadband 2–8.3 GHz microwave chirp, observed with our new chirped-pulse broadband rotational spectrometer, COMPACT. Such multi-resonance excitations significantly alter the relative intensity patterns and are a strong indication that, for the given experimental conditions and using benzonitrile as a polar test molecule (μA = 4.5152 D), the rapid adiabatic passage (RAP) regime for strong coupling must be applied. This finding is contrary to previous discussions of chirped-pulse rotational spectroscopy, where the linear fast passage regime of weak coupling has been assumed.