1,720,981 research outputs found
High resolution synchrotron far-infrared study of CH2D79Br: the v6 fundamental and 2v6-v6, v5+v6-v6 and v6+v9-v6 hot bands
No full textHIGH RESOLUTION INFRARED SPECTROSCOPY OF CH2D81Br: THE GROUND, v5 = 1, v6 = 1 AND v9 = 1 STATE CONSTANTS
No full textPoster O3
High-resolution infrared spectroscopy of the interacting v9, v5+v6 and 3v6 levels of CH279BrF
No full textThe high-resolution (0.0030 cm(-1)) Fourier transform infrared spectrum of (CH2BrF)-Br-79 has been studied in part of the atmospheric window between 910 and 980 cm(-1), the region of the v(9) (935.847 cm(-1)) and V-5 + v(6) (961.239 cm(-1)) bands. The v9 fundamental consists of a pseudo a-type band induced by Coriolis coupling with v(5) + v(6), in turn exhibiting a predominant a-type structure. Several interactions connecting these levels and the dark state 3v(6) have been assessed. The whole data set is treated using Watson's A-reduced Hamiltonian in the 1(r) representation implemented with first order a- and b- and c-type Coriolis terms. A detailed analysis of the rotational structure yields a set of accurate upper-state parameters up to quartic distortion terms for v(9) and v(5) + v(6). In addition, spectroscopic information about the dark ternary overtone of v(6) has been obtained. (C) 2011 Elsevier Inc. All rights reserved
High Resolution Infrared Spectroscopy of CH2D79Br: Analysis of the v4 and v8 Interacting Fundamental Bands
No full text
High-resolution infrared and microwave studies of CH2(79)BrF and CH2(81)BrF: the ground, nu5 = 1 and nu6 = 1,2 state constants.
No full textHigh resolution infrared spectrum of CH2D79Br: the v6=1,2, v5=v6=1 and v6=v9 state constants
No full textPoster L2
High resolution infrared synchrotron study of CH<sub>2</sub>D<sup>81</sup>Br: ground state constants and analysis of the ν<sub>5</sub>, ν<sub>6</sub> and ν<sub>9 </sub>fundamentals
No full textThe high resolution infrared absorption spectrum of CH2D81Br has been recorded by Fourier transform spectroscopy in the range 550–1075 cm1, with an unapodized resolution of 0.0025 cm-1, employing a synchrotron radiation source. This spectral region is characterized by the ν6 (593.872 cm-1), ν5 (768.710 cm-1) and ν9 (930.295 cm-1) fundamental bands. The ground state constants up to sextic centrifugal distortion terms have been obtained for the first time by ground-state combination differences from the three bands and subsequently employed for the evaluation of the excited state parameters. Watson’s A-reduced Hamiltonian in the Ir representation has been used in the calculations. The ν6=1 level is essentially free from perturbation whereas the ν5=1 and ν9=1 states are mutually interacting through α-type Coriolis coupling. Accurate spectroscopic parameters of the three excited vibrational states and a high-order coupling constant which takes into account the interaction between ν5 and ν9 have been determined.</p
High resolution infrared study of CH281BrF in the range 920 – 1370 cm-1: rovibrational analysis and resonances of v3, v4, v8, v9 fundamentals and v5+v6 combination band
No full textHigh-resolution infrared spectroscopy of CH281BrF near 8 μm: rovibrational analysis of the ν3 and ν8 fundamentals and resonances with the dark states 2ν5 and ν6 + ν9
No full textThe infrared spectrum of isotopically enriched CH2 81BrF was investigated in the ν3 and ν8 region between 1150 and 1370 cm−1 at a resolution of 0.003 cm−1. The ν3 vibration of symmetry species A gives rise to an a-/b-hybrid band with a-type predominance, while the ν8 mode of A symmetry produces c-type absorption. Due to the proximity of the band origins to those of closely lying overtones and combination bands, the v3 = 1 and v8 = 1 levels were found perturbed through Coriolis resonance by the v5 = 2 (A) and v6 = v9 = 1 (A) states, respectively. The spectral analysis resulted in the identification of 3132 transitions (J ≤ 98 and Ka ≤ 14) for the ν3 and 2958 transitions (J ≤ 68 and Ka ≤ 19) for the ν8 bands. The assigned data were fitted using theWatson’s A-reduction Hamiltonian in the Ir representation and the perturbation operators. Although no transitions belonging to the perturbers were observed, the band origins and excited state parameters for fundamentals and ‘dark states’ together with coupling terms for the ν3/2ν5 and ν8/ν6 + ν9 dyads were determined
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