dc.creator Koch, Mark en_US dc.creator Collins, C. B. en_US dc.date.accessioned 2006-06-15T14:06:28Z dc.date.available 2006-06-15T14:06:28Z dc.date.issued 1978 en_US dc.identifier 1978-TB-08 en_US dc.identifier.uri http://hdl.handle.net/1811/10590 dc.description Author Institution: Department of Chemistry, University of Iowa; University of Texas at Dallas, University of Iowa en_US dc.description.abstract A spectroscopic investigation of atomic and molecular lithium has been carried out in the region from 7150 {\AA} to 2400 {\AA} utilising a new detector device. This device, the heat pipe diode, employs the method of space charge ion detection in the heat pipe oven. CW and pulsed tunable dye lasers as well as classical light sources were used. One through four photon events were observed. Multiphoton absorption was observed in both the atom and molecule and a hybrid resonance involving both the atom and the molecule was observed. All the known molecular transitions were observed except the A-X transition (red bands). The weakness of the signal due to this band system made possible the observation of a new multiphoton molecular band system from 6000 {\AA} to 5875 {\AA} excited by a CW dye laser; with pulsed laser irradiation, this system expanded from 6210 {\AA} to 5675 {\AA}. The position of these bands agrees with a classical calculation of the overlap of the $^{3} \Sigma^{+}_{u}$ and $^{3} \Pi_{g}$ molecular states. The band structure might thus be attributed to a two photon molecular transition from the lowest $^{3} \Sigma^{+}_{u}$ state to an unknown upper ungerade state with the $^{3} \Pi_{g}$ state as a nearly resonate intermediate level. en_US dc.format.extent 150407 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title MULTIPHOTON ABSORPTION SPECTROSCOPY OF Li AND $Li_{2}$ USING A HEAT PIPE DIODE en_US dc.type article en_US
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