# HIGH RESOLUTION FOURIER SPECTROSCOPY OF THE $Ar^{+}$ LASER 5145 {\AA} EXCITED $I_{2}$ FLUORESCENCE SPECTRUM

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/10410

Files Size Format View
1978-MF-02.jpg 161.4Kb JPEG image

 Title: HIGH RESOLUTION FOURIER SPECTROSCOPY OF THE $Ar^{+}$ LASER 5145 {\AA} EXCITED $I_{2}$ FLUORESCENCE SPECTRUM Creators: Bacis, R.; Churassy, S.; Field, R. W.; Koffend, J. Brooke; Vergès, J. Issue Date: 1978 Publisher: Ohio State University Abstract: This preliminary work demonstrates the feasibility of obtaining a high resolution spectrum of cw laser excited fluorescence using a Fourier spectrometer. Using 1.3W of 5145 {\AA} multimode power from an $Ar^{+}$ laser, fluorescence is excited mainly via the P(13) and R(15) (43,0) lines. Nearly all of the main fluorescence lines [P(13) , P(17), R(11), R(15)] originating from $v^{\prime} = 43$ are observed up to $v^{\prime\prime} = 85$. Their recorded full width at half maximum in the $7000-8000\;cm^{-1}$ region is $0.023\;cm^{-1}$. Rotational relaxation $(\Delta J^{\prime}=2n)$ allows observation of numerous odd-$J^{\prime\prime}$ satellite lines. The usual parameters are obtained which accurately represent the rotation-vibration levels of $I_{2} X^{1}\Sigma_{g} {^{+}}$ through $v^{\prime\prime} = 85$. The vibrational line intensities clearly show the alternation pattern predicted by the Franck-Condon factors of $Tellinghuisen.^{1}$ The agreement between measured and calculated intensities is only qualitative for high $v^{\prime\prime}$ values. This has important implications with respect to the $I_{2}$ laser gain measurements discussed in the following talk. Description: $^{1}$J. Tellinghuisen, J. Quant. Spect. Rad. Transf. 19, 149 (1978)."" Author Institution: Laboratoire de Spectrom\'etrie Ionique et Mol\'eculaire 43; Department of Chemistry, Massachusetts Institute of Technology; Department of Chemistry, Laboratoire Aim\'e Cotton -C.N.R.S. II URI: http://hdl.handle.net/1811/10410 Other Identifiers: 1978-MF-02