Visible electronic emission spectra of diatomic molecules: Analysis of the aluminum oxide (B-X) and boron iodide(a-X) systems, and first observations of some 11-valence electron cations, selenium oxide cation, phosphorus chloride cation, phosphorus bromide cation, and arsenic chloride cation.
Date
1990
Authors
Naxakis, Stavros.
Journal Title
Journal ISSN
Volume Title
Publisher
Dalhousie University
Abstract
Description
Twenty-five bands of the B$\sp2\Sigma\ -$ X$\sp2\Sigma$ system of AlO with 0 $\leq$ v$\sp\prime$ $\leq$ 9 and 0 $\leq$ v$\sp{\prime\prime}$ $\leq$ 6 have been photographed at high resolution. The measured positions of the assigned lines of each band have been fitted by least-squares to obtain estimates of the constants (B$\sp\prime$,D$\sp\prime$,B$\sp{\prime\prime}$, D$\sp{\prime\prime})$ the band origin, and $\Delta\gamma\sb{\upsilon\sp\prime\upsilon\sp{\prime\prime}},$ the difference of the upper and lower state spin-doubling constants. The parameters from individual bands have been merged to single-valued estimates, as well as to polynomial representations in (v + 1/2).
New visible systems of red-degraded bands have been observed in emission from reactions of discharged helium with PCl$\sb3$, AsCl$\sb3$ and SeOCl$\sb2$, and assigned as $\sp2\Pi\ \to$ X$\sp2\Pi$ transitions of PCl$\sp{+}$, AsCl$\sp{+}$ and SeO$\sp{+}$. The same excitation technique with BI$\sb3$ substrate was employed for the observation of the a$\sp3\Pi$(0$\sp{+},1) \to$ X$\sp1\Sigma\sp{+}$ band systems of BI; the a(1) $\to$ X system was observed for the first time. Head positions measured from photoelectrically recorded spectra have been fitted by least-squares to obtain estimates of the vibrational constants of the states involved in the transitions. In addition, eight bands of the a(0$\sp{+}) \to$ X system and two bands of the a(1) $\to$ X system of $\sp $BI have been rotationally analyzed. Three bands (0-16, 0-17, 0-18) of the $\sp2\Pi\ -$ X$\sp2\Pi$ system of P$\sp{35}$Cl$\sp{+}$ have been rotationally analyzed. The determined constants include the first estimated spin-orbit coupling constants for both states. The reliability of these estimates is discussed.
Finally, the results of the reactions of discharged helium with PBr$\sb3$, and various other substrate molecules are also discussed.
Thesis (Ph.D.)--Dalhousie University (Canada), 1990.
New visible systems of red-degraded bands have been observed in emission from reactions of discharged helium with PCl$\sb3$, AsCl$\sb3$ and SeOCl$\sb2$, and assigned as $\sp2\Pi\ \to$ X$\sp2\Pi$ transitions of PCl$\sp{+}$, AsCl$\sp{+}$ and SeO$\sp{+}$. The same excitation technique with BI$\sb3$ substrate was employed for the observation of the a$\sp3\Pi$(0$\sp{+},1) \to$ X$\sp1\Sigma\sp{+}$ band systems of BI; the a(1) $\to$ X system was observed for the first time. Head positions measured from photoelectrically recorded spectra have been fitted by least-squares to obtain estimates of the vibrational constants of the states involved in the transitions. In addition, eight bands of the a(0$\sp{+}) \to$ X system and two bands of the a(1) $\to$ X system of $\sp $BI have been rotationally analyzed. Three bands (0-16, 0-17, 0-18) of the $\sp2\Pi\ -$ X$\sp2\Pi$ system of P$\sp{35}$Cl$\sp{+}$ have been rotationally analyzed. The determined constants include the first estimated spin-orbit coupling constants for both states. The reliability of these estimates is discussed.
Finally, the results of the reactions of discharged helium with PBr$\sb3$, and various other substrate molecules are also discussed.
Thesis (Ph.D.)--Dalhousie University (Canada), 1990.
Keywords
Physics, Molecular.