dc.creator Bickel, G. A. en_US dc.creator Griffith, W. B. en_US dc.creator Mathews, C. W. en_US dc.date.accessioned 2007-08-31T14:12:03Z dc.date.available 2007-08-31T14:12:03Z dc.date.issued 1982 en_US dc.identifier 1982-MG-11 en_US dc.identifier.uri http://hdl.handle.net/1811/29179 dc.description $^{1}$F.C. Wyse and W. Gordy, J. Chem. Phys. 56, 2130 (1972). en_US dc.description.abstract Observations of the absorption spectrum of AlCl has led to the identification of five new electronic systems in the region between $1500 and 1900 \AA$. The strength of the transitions from the ground state, $known^{1}$ to be $X ^{1}\Sigma^{+}$, suggests strongly that each of the newly observed states is a singlet state. Vibrational assignments were based on band head measurements of the $Al^{35} Cl/Al^{37}Cl$ isotopes and/or correlation with the known ground state vibrational frequencies. We have designated the first new system, near $1839 \AA$, as the B - X system since no new bands were observed in absorption between this system and the $A ^{1} \Pi = X ^{1}\Sigma^{+}$ system at $2600 \AA$, The B - X and B - X system display extensive rotational structure, but the C - X, D - X, and F - X systems were not sufficiently resolved to permit rotational analyses. Rotational analyses of the 1-0, 0-0, and 0-1 bands of the B - X system establish that the upper state is a $^{1}\Sigma^{+}$ state with the following constants $(in cm^{-1}): \nu_{00} = 54 385.1, \Delta G_{1} = 583.0. B_{0} = 0.2641, B_{1} = 0.2627$, and $D_{0} D_{1} = 2.1 \times 10^{-7}$. The apparance of Q heads in the E - X system requires that the upper state be $^{1}\pi$, and the separation between Q and P heads permits an estimate of the upper state B values for $\nu^{1} = 0 = 5$. Efforts are continuing for a full rotational analysis of these bands. Work is also underway on the remaining band systems which have extensive but overlapping structures. en_US dc.format.extent 116647 bytes dc.format.mimetype image/jpeg dc.language.iso English en_US dc.publisher Ohio State University en_US dc.title THE ABSORPTION SPECTRUM AlCl BETWEEN $1300 AND 2500 \AA$ en_US dc.type article en_US
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