dc.creator Reinhard, I. en_US dc.creator Callegari, C. en_US dc.creator Lehmann, K. K. en_US dc.creator Scoles, G. en_US dc.date.accessioned 2006-06-15T19:05:45Z dc.date.available 2006-06-15T19:05:45Z dc.date.issued 1998 en_US dc.identifier 1998-RJ-03 en_US dc.identifier.uri http://hdl.handle.net/1811/18979 dc.description Author Institution: Department of Chemistry, Princeton University en_US dc.description.abstract In the framework of the investigation of the relaxation mechanisms of molecular rotational and vibrational excitations in a superfluid helium cluster environment, the first microwave absorption spectra have been obtained for He clusters doped with acetonitrile $(CH_{3}CN)$. Two broad $(\approx 1 GHz)$ peaks centered at about 12.5 and 15 GHz have been observed using bolometric detection of the beam attenuation caused by successive absorption of several microwave photons in a 10 cm long waveguide. The change in rotational constants induced by the presence of the medium preclude assignment based on a mere comparison with gas phase spectra. Further measurements are currently in progress to assign the observed features and determine the rotational relaxation times of the system. en_US dc.format.extent 92710 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title FIRST MICROWAVE SPECTRA IN DOPED HELIUM CLUSTERS en_US dc.type article en_US
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