dc.creator McCarthy, M. C. en_US dc.creator Grabow, Jens-Uwe en_US dc.creator Travers, Michael J. en_US dc.creator Chen, Wei en_US dc.creator Gottlieb, C. A. en_US dc.creator Thaddeus, P. en_US dc.date.accessioned 2006-06-15T19:11:45Z dc.date.available 2006-06-15T19:11:45Z dc.date.issued 1998 en_US dc.identifier 1998-WH-11 en_US dc.identifier.uri http://hdl.handle.net/1811/19174 dc.description Author Institution: Harvard-Smithsonian Center for Astrophysics and Division of Engineering and Applied Sciences en_US dc.description.abstract The linear cyanopolyynes $HC_{15}N$ and $HC_{17}N$ were detected in the laboratory by Fourier-transform microwave spectroscopy. Enough rotational lines of each species were measured in the 5-11 GHz frequency range so that precise values for the rotational and centrifugal distortion constants can be determined and the entire rotational spectra of both molecules predicted to high accuracy (i.e., better than $1 km s^{-1}$ in equivalent radial velocity). Although there is a nearly constant decrement in line intensity from $HC_{3}N$ to $HC_{9}N$ of about seven, the decrement decreases by at least a factor of two on reaching $HC_{17}N$. As a result the lines of $HC_{17}N$ are nearly an order of magnitude stronger than predicted by extrapolation from the shorter cyanopolyynes. en_US dc.format.extent 93631 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title LABORATORY DETECTION OF THE CARBON CHAINS $HC_{15}N AND HC_{17}N$ en_US dc.type article en_US
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