By G. Guelachvili, K. Narahari Rao (auth.), G. Guelachvili (eds.)
With the arrival of recent tools and theories, a large amount of spectroscopic details has been accumulated on molecules in this final decade. The infrared, specifically, has visible awesome task. utilizing Fourier remodel interferometers and infrared lasers, exact information were measured usually with severe sensitivity. those information have additionally been analyzed and actual molecular parameters made up our minds. quantity II/20 "Molecular Constants ordinarily from Infrared Spectroscopy" is a up to date Landolt-Börnstein book sequence. it really is made from a number of subvolumes (A, B, C, D) with accomplished compilation of significantly evaluated molecular constants of diatomic (A), linear triatomic (B), different triatomic (C) and different polyatomic (D) molecules.
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Extra info for Linear Triatomic Molecules - HCC-, HCC+, CCO-, CCO, CCS, CCC, CCC++
Sample text
G− 200 Πu + Σu+ 03+3 1 Σu+ 05+3 1 13 3 + Σu 11 3 1 + + Σu 05 1 1 + Σu+ + Σu 1 Πg and/or 1∆u Πu? ~ Πg and/or ∆u − X 1Σg+ Σu+ 32 606 1 32 606 1 32 750 1 33 147 1 33 486 1 33 589 1 33 768 1 34 458 1 34 603 1 34 710 1 35 549 1 35 561 1 35 782 1 36 443 1 1 + Πg and/or ∆u Σu Πg and/or 1∆u Σu+ Πg and/or ∆u Σu + Πg and/or 1∆u Σu+ Πg and/or ∆u Σu + Πg and/or 1∆u Σu+ Πg and/or 1∆u Σu+ Πg and/or ∆u Σu + Πg and/or 1∆u Πu? Πg and/or ∆u Σu Πg and/or 1∆u Πu Πg and/or ∆u + 1 1 1 1 1 1 61 Σu Lower state Electronic Vibrational v1 v2 v3 ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ ~ X 1Σg+ Vibronic 010 Πu 000 1 33 020 Σg+ 23 000 Σg+ 23 000 1 33 010 Πu 23 000 Σg+ 23 000 1 000 1 000 1 000 000 Σg+ Σg+ 23 Σg+ 33 Σg+ 33 Σg+ 33 1 Σg+ 33 1 + Σg 33 ) The notation used in identifying the energy level has been explained in section X of the Introduction.
N is the number of lines used in the fit. SD: Standard Deviation. 010 4 12 C13C32S (12C13C32S) Table 6. Reference Method Equations used in the fit Statistical errors Remarks Abbreviation ~ Molecular constants in MHz for the ground state X 3Σ−. 97Ike Fourier transform microwave spectroscopy. Conventional Hamiltonian for a 3Σ− state including hyperfine interaction. See Eq. 1 in [97Ike]. Three standard deviations in units of the least significant digits. Parameters with no uncertainty are held fixed in the fit.
81Pit Laser spectroscopy. Uncertainties on the band positions are of the order of 5 cm−1. ∆ν is the shift in cm−1 from exciting laser. The band center ν0 is in nm. 1 C12C16O (12C12C16O) Table 11. Reference Method Equations used in the fit Statistical errors Remarks 12 C12C16O (12C12C16O) 12 ~ Molecular constants in cm−1 for the ν1 band in the X 3Σ− state. 86Yam Diode laser spectroscopy. Eqs. 14. Two and half standard deviations in units of the least significant digits. Ground state constants are held fixed to the values given in Table 1.