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Article: The Schumann-Runge absorption bands of 16O 18O in the wavelength region 175-205 nm and spectroscopic constants of isotopic oxygen molecules
Title | The Schumann-Runge absorption bands of 16O 18O in the wavelength region 175-205 nm and spectroscopic constants of isotopic oxygen molecules |
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Authors | |
Issue Date | 1989 |
Publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/yjmsp |
Citation | Journal Of Molecular Spectroscopy, 1989, v. 134 n. 2, p. 362-389 How to Cite? |
Abstract | High-resolution absorption spectra of 16O 18O have been photographed, at 300 and 78 K, throughout the region 175-205 nm, in the first order of a 2400 lines/mm grating in a 6.65-m vacuum spectrograph at a dispersion of 0.06 nm/mm. Precise wavelength measurements and rotational analyses of the Schumann-Runge bands (2,0)-16,0) have been completed. Spectroscopic constants of the B 3Σ u - state of 16O 18O for 2 ≤ v ≤ 16 have been determined. Rotational perturbations are observed in the (16,0) band. The concept of mass-reduced vibrational quantum numbers, μ - 1 2(v + 1 2), has been used to combined isotopic molecular constants from 16O 2, 16O 18O, and 18O 2. It has been shown that the functions of the vibrational spacings, μ 1 2ΔG v+ 1 2, rotational constants μB v, and μ 2D v, spin-spin constants, λ v, and spin-rotation constants, μγ v, are isotopically invariant functions of μ - 1 2(v + 1 2). The isotopic dependence of the spin-spin constants λ v is discussed in terms of the unique perturber approximation. Values of γ v and λ v have been obtained by interpolation for the levels v = 2-8, which correspond to bands of 16O 18O with unresolved triplet structure. In a theoretical investigation, the calculations of level shifts and perturbations have been reexamined. Excellent agreement between calculated and experimental level shifts has been obtained for all three isotopic molecules. © 1989. |
Persistent Identifier | http://hdl.handle.net/10722/147698 |
ISSN | 2023 Impact Factor: 1.4 2023 SCImago Journal Rankings: 0.374 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Cheung, ASC | en_HK |
dc.contributor.author | Yoshino, K | en_HK |
dc.contributor.author | Freeman, DE | en_HK |
dc.contributor.author | Friedman, RS | en_HK |
dc.contributor.author | Dalgarno, A | en_HK |
dc.contributor.author | Parkinson, WH | en_HK |
dc.date.accessioned | 2012-05-29T06:08:46Z | - |
dc.date.available | 2012-05-29T06:08:46Z | - |
dc.date.issued | 1989 | en_HK |
dc.identifier.citation | Journal Of Molecular Spectroscopy, 1989, v. 134 n. 2, p. 362-389 | en_HK |
dc.identifier.issn | 0022-2852 | en_HK |
dc.identifier.uri | http://hdl.handle.net/10722/147698 | - |
dc.description.abstract | High-resolution absorption spectra of 16O 18O have been photographed, at 300 and 78 K, throughout the region 175-205 nm, in the first order of a 2400 lines/mm grating in a 6.65-m vacuum spectrograph at a dispersion of 0.06 nm/mm. Precise wavelength measurements and rotational analyses of the Schumann-Runge bands (2,0)-16,0) have been completed. Spectroscopic constants of the B 3Σ u - state of 16O 18O for 2 ≤ v ≤ 16 have been determined. Rotational perturbations are observed in the (16,0) band. The concept of mass-reduced vibrational quantum numbers, μ - 1 2(v + 1 2), has been used to combined isotopic molecular constants from 16O 2, 16O 18O, and 18O 2. It has been shown that the functions of the vibrational spacings, μ 1 2ΔG v+ 1 2, rotational constants μB v, and μ 2D v, spin-spin constants, λ v, and spin-rotation constants, μγ v, are isotopically invariant functions of μ - 1 2(v + 1 2). The isotopic dependence of the spin-spin constants λ v is discussed in terms of the unique perturber approximation. Values of γ v and λ v have been obtained by interpolation for the levels v = 2-8, which correspond to bands of 16O 18O with unresolved triplet structure. In a theoretical investigation, the calculations of level shifts and perturbations have been reexamined. Excellent agreement between calculated and experimental level shifts has been obtained for all three isotopic molecules. © 1989. | en_HK |
dc.language | eng | en_US |
dc.publisher | Academic Press. The Journal's web site is located at http://www.elsevier.com/locate/yjmsp | en_HK |
dc.relation.ispartof | Journal of Molecular Spectroscopy | en_HK |
dc.title | The Schumann-Runge absorption bands of 16O 18O in the wavelength region 175-205 nm and spectroscopic constants of isotopic oxygen molecules | en_HK |
dc.type | Article | en_HK |
dc.identifier.email | Cheung, ASC:hrsccsc@hku.hk | en_HK |
dc.identifier.authority | Cheung, ASC=rp00676 | en_HK |
dc.description.nature | link_to_subscribed_fulltext | en_US |
dc.identifier.doi | 10.1016/0022-2852(89)90323-8 | - |
dc.identifier.scopus | eid_2-s2.0-0000551749 | en_HK |
dc.identifier.volume | 134 | en_HK |
dc.identifier.issue | 2 | en_HK |
dc.identifier.spage | 362 | en_HK |
dc.identifier.epage | 389 | en_HK |
dc.identifier.isi | WOS:A1989U180500012 | - |
dc.publisher.place | United States | en_HK |
dc.identifier.scopusauthorid | Cheung, ASC=7401806538 | en_HK |
dc.identifier.scopusauthorid | Yoshino, K=7401650773 | en_HK |
dc.identifier.scopusauthorid | Freeman, DE=23021313300 | en_HK |
dc.identifier.scopusauthorid | Friedman, RS=7401990536 | en_HK |
dc.identifier.scopusauthorid | Dalgarno, A=22987883200 | en_HK |
dc.identifier.scopusauthorid | Parkinson, WH=7006361375 | en_HK |
dc.identifier.issnl | 0022-2852 | - |