Wang, Duanxiang (1992) The gamma system of the nitric-oxide isotopomers ¹⁴N¹⁶O, ¹⁵N¹⁶O, ¹⁴N¹⁸O and ¹⁵N¹⁸O. Masters thesis, Memorial University of Newfoundland.
PDF (Migrated (PDF/A Conversion) from original format: (application/pdf))
- Accepted Version
Available under License - The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
The spectra of the gamma (A ²∑⁺ - X²πr) system of the nitric-oxide isotopomers ¹⁴N¹⁶O, ¹⁵N¹⁶O, ¹⁴N¹⁸O and ¹⁵N¹⁸O, excited in the anode glow of a two-column hollow-cathode discharge tube of special design (Reddy and Prasad. J. Phys. E. Sci. Instr. 22, 306, 1989), were photographed in the spectral region 2140-2730 Å on a 2 m Bausch and Lomb spectrograph under medium resolution and the spectrum of ¹⁵N¹⁸O was also recorded on a 3.4 m Jarrell-Ash spectrograph under high resolution. The spectrum of ¹⁴N¹⁶O was obtained from the natural presence of nitrogen-14 and oxygen-16 of low pressure air in the discharge tube. The spectra of ¹⁵N¹⁶O and ¹⁴N¹⁸O were produced by admitting nitrogen-15 and oxygen-18 into the discharge tube, respectively. The spectrum ¹⁵N¹⁸O was produced by admitting a mixture of nitrogen-15 and oxygen-18 into the same discharge tube. The gamma system has been observed for the first time for ¹⁵N¹⁸O. -- For each of the isotopomers, six bands, namely, 1-0, 0-0, 0-1, 0-2, 0-3 and 0-4, each having four heads P₁₂ee, P₂₂ff/Q₁₂ef, P₁₁ee and P₂₁ff/Q₁₁ef, have been observed. The vibrational structures of the observed bands have been analyzed from the wavenumber data of the band heads of all the isotopomers of NO. In each case ∆G(1/2) of the A ²∑⁺ state and vibrational constants we and wexe of the X²π₃/₂ and X²π₁/₂ components of the ground electronic state have been determined. -- The rotational structure of the individual 0-1, 0-2 and 0-3 bands of the gamma system of ¹⁵N¹⁸O, photographed under high resolution, has been analyzed using the effective Hamiltonian proposed by Brown et al (J. Mol. Spectrosc. 74, 294, 1979) and a unique set of molecular constants has been obtained by the method of merging. The derived molecular constants in cm⁻¹ of ¹⁵N¹⁸O are: -- A ²∑⁺: ∆G(1/2)=2237.1 -- X²π: we=1819.15; wexe=12.870; Be=1.55644; αe=0.015343; De=4.5574x10⁻⁶. -- Also obtained for the X²π state are the values of Av, ADv, pV, qv for v = 1, 2, and 3 levels.
|Item Type:||Thesis (Masters)|
|Additional Information:||Bibliography: leaves 79-82.|
|Department(s):||Science, Faculty of > Physics and Physical Oceanography|
|Library of Congress Subject Heading:||Nitric oxide; Molecular spectra; Vibrational spectra|
Actions (login required)