title: Infrared laser spectroscopy of jet-cooled carbon clusters:  the bending dynamics of linear C9.
abstract: We report improved measurements for the nu 6 antisymmetric stretch fundamental and observation of the (nu 6 + nu 15)-nu 15 and (nu 6 + 2 nu 15)-2 nu 15 hot bands of the linear C9 carbon cluster by direct absorption diode laser spectroscopy of a supersonic carbon cluster beam.  Analysis of these bands characterizes C9 as a semirigid molecule with a bending potential similar to that of C5 and further evidences the alternation in degree of rigidity of linear carbon clusters with the g-u symmetry of the HOMO.
authors.affiliation: Department of Chemistry, University of California, Berkeley 94720, USA.
authors.forename: A
authors.initials: A
authors.lastname: Van Orden
authors.forename: H J
authors.initials: HJ
authors.lastname: Hwang
authors.forename: E W
authors.initials: EW
authors.lastname: Kuo
authors.forename: R J
authors.initials: RJ
authors.lastname: Saykally
mesh_terms: D055580:Astronomical Phenomena; D001256:Astronomy; D002244:Carbon / Q000737:chemistry*; D003312:Coriolis Force; D007834:Lasers; D008958:Models, Molecular; D015394:Molecular Structure; D013055:Spectrophotometry, Infrared; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D002244:Carbon