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Spark spectra of leadLyall, Kenneth Russell January 1965 (has links)
The atomic and ionic spectra of lead have been photographed in the region between 350 A and 7680 A, using a three meter normal incidence vacuum grating spectrograph, and a Hilger large quartz-glass prism spectrograph. Spectroscopic
sources used throughout this region were the electrodeless discharge, and the condensed spark in helium. Approximately 4075 lead lines were measured, and of these, 1006 have been classified in the spectra of Pb I, Pb II, Pb III, and Pb IV. The Pb IV analysis has been extended: relative energies have been assigned to eight even and two odd levels arising from the 5d¹ºns, np, nd and ng configurations,
and tentative values given to several levels from the 6s7s and 6s6d configurations of the 5d⁹ core. The core-polarization theory has been applied to the observed 5g - nh transitions of Pb IV, giving a value for the ionization potential of 341438 cm⁻¹. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
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Spark spectra of thallium and leadGutmann, Francis January 1969 (has links)
The atomic spectra of Thallium were excited and photographed in the spectral
region from 340 to 9000 Å , using both an electrodeless discharge and a spark-in-Helium as light sources.
The single electron Rydberg series have been extended in TI III. The
ionization potential of TI III and Pb IV was determined from hydrogenic
terms and found to be 240773 ± 5 cm⁻¹ and 342438 ± 5 cm⁻¹ respectively.
The dipole polarizability of TI III was found to be 2.53 ± .02 a³₀ and
of Pb IV 4.37 ± .04 a³₀. Using a line list previously obtained in this laboratory, terms belonging to three electron configuration were established
in TI III and Pb IV.
The 5d⁹ ns series was extended in TI IV and an ionization potential of
412500 ± 300 cm⁻¹ arrived at. In TI IV and Pb V the two electron
configurations 5d⁹ 6d, 5d⁹ 5f, 5d⁹ 7p and 5d⁸ 6s² were partially established
while a number of terms belonging to the complex 5d⁸ 6s6p configuration
could be identified as well. The analysis of TI II was extended by
completing the 5d¹º 6p² configuration and identifying a number of odd and even parity terms above the first ionization limit. These were
tentatively assigned to the 5d¹º 6p7p, 5d⁹ 6s² 7s, 5d⁹ 6s² 6d, 5d⁹6s6p²
and the 5d¹º6p7s configurations.
The number of classified TI III lines, involved in this extension of the term analysis, has increased from 247 to 579. In the TI IV spectrum the increase in classified lines has been from 35 to 308 lines. In lead spectra the increase in Pb IV has been from 134 lines to 460, and in Pb V the corresponding increase is from 200 to 303 lines. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
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