title: Tunable far-IR laser spectroscopy of jet-cooled carbon clusters:  the nu 2 bending vibration of C3.
abstract: Seven rovibrational transitions of the (01(1)0) <-- (00(0)0) fundamental bending band of C3 have been measured with high precision with the use of a tunable far-infrared laser spectrometer.  The C3 molecules were produced by laser vaporization of a graphite rod and cooled in a supersonic expansion.  The astrophysically important nu 2 fundamental frequency is determined to be 63.416529(40) cm-1.  These measurements provide the basis for studies of C3 in the interstellar medium with far-infrared astronomy.
authors.affiliation: Department of Chemistry, University of California, Berkeley 94720, USA.
authors.forename: C A
authors.initials: CA
authors.lastname: Schmuttenmaer
authors.forename: R C
authors.initials: RC
authors.lastname: Cohen
authors.forename: N
authors.initials: N
authors.lastname: Pugliano
authors.forename: J R
authors.initials: JR
authors.lastname: Heath
authors.forename: A L
authors.initials: AL
authors.lastname: Cooksy
authors.forename: K L
authors.initials: KL
authors.lastname: Busarow
authors.forename: R J
authors.initials: RJ
authors.lastname: Saykally
mesh_terms: D001256:Astronomy / Q000295:instrumentation / Q000379:methods*; D002244:Carbon / Q000032:analysis* / Q000737:chemistry; D007834:Lasers; D016082:Solar System; D013055:Spectrophotometry, Infrared; D013057:Spectrum Analysis
chemical_list: D002244:Carbon