TITLE

Hyperfine structure and lifetime of the C 2Σ+, v=0 state of CH

AUTHOR(S)
Ubachs, Wim; Meyer, Gerard; ter Meulen, J. J.; Dymanus, A.
PUB. DATE
March 1986
SOURCE
Journal of Chemical Physics;3/15/1986, Vol. 84 Issue 6, p3032
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
From a laser induced fluorescence (LIF) experiment on a molecular beam of CH, we have obtained the b and c hyperfine constants, the γ and γD spin-rotation constants as well as accurate values for the rotational constants B, D, and H for the C 2Σ+, v=0 state. From measurements of the linewidths, that are partially caused by predissociation, and by comparing relative line intensities, we determined different lifetimes for upper (F1) and lower (F2) ρ-doublet states of the C 2Σ+ state. For the F1 states we find a constant lifetime of 3.7±1.0 ns, that is independent of N, while for the F2 states we observed an increase in lifetime for higher N up to 8.0±1.5 ns for N=11.
ACCESSION #
7642137

 

Related Articles

  • Hyperfine quantum beats and Zeeman spectroscopy in the polyatomic molecule propynal HC≡CCHO. Dubs, M.; Mühlbach, J.; Bitto, H.; Schmidt, P.; Huber, J. Robert // Journal of Chemical Physics;10/15/1985, Vol. 83 Issue 8, p3755 

    Quantum beats in the fluorescence decay of two single rovibronic levels of optically excited propynal (HC≡CCHO) have been measured in a supersonic jet apparatus. The complex beat pattern was explored using laser light of linear and circular polarization under zero-field conditions (nulled...

  • Elucidation of electronic structure by the analysis of hyperfine interactions: The MnH A 7Π–X 7Σ+ (0,0) band. Varberg, Thomas D.; Field, Robert W.; Merer, Anthony J. // Journal of Chemical Physics;8/1/1991, Vol. 95 Issue 3, p1563 

    We present a complete analysis of the hyperfine structure of the MnH A 7Π–X 7Σ+ (0,0) band near 5680 Å, studied with sub-Doppler resolution by intermodulated fluorescence spectroscopy. Magnetic hyperfine interactions involving both the 55Mn (I=5/2) and 1H (I=1/2) nuclear spins...

  • High Temperature Transformation of Iron Minerals in Bauxite. Raj, D.; Harchand, K. S.; Aggarwal, S.; Taneja, S. P. // Hyperfine Interactions;2004, Vol. 153 Issue 1-4, p153 

    Mössbauer hyperfine and X-ray diffraction studies have been carried on original bauxite sample and thermally treated (between 200 and 1200°C) samples. Mössbauer spectrum of original bauxite shows the dominance of hematite (α-Fe2O3) along with Al-substituted hematite and goethite...

  • Mössbauer Studies of Thermal Power Plant Coal and Fly Ash. Taneja, S. P. // Hyperfine Interactions;2004, Vol. 153 Issue 1-4, p83 

    Iron-57 Mössbauer spectroscopic studies were carried out at room temperature on samples of coal, slag (bottom ash) and mechanical ash collected from Bhatinda (India) thermal power plant. Hyperfine parameters such as isomer shift, quadrupole splitting and total internal magnetic field of 57Fe...

  • Hyperfine quantum beats in the 209 nm fluorescence excitation spectrum of cyanogen. Hemmi, Naoki; Cool, Terrill A. // Journal of Chemical Physics;11/8/1996, Vol. 105 Issue 18, p7964 

    Singlet–singlet, singlet–triplet, and polarization hyperfine fluorescence quantum beats are observed following 209 nm excitation of the 1141 vibronic level of the A(1Σ-u) S1 singlet state. Singlet–singlet quantum beats arise from S1–S0 vibronic coupling to states...

  • Electronic transitions of cobalt carbide, CoC, near 750 nm: A good example of case (bβS) hyperfine coupling. Barnes, M.; Merer, A. J.; Metha, G. F. // Journal of Chemical Physics;11/15/1995, Vol. 103 Issue 19, p8360 

    The laser induced fluorescence spectrum of jet-cooled CoC near 750 nm has been measured at high resolution following the reaction of laser-ablated cobalt atoms with methane. The X2Σ+ ground state of CoC is an unusually good example of Hund’s case (bβS) coupling. Since Co has a...

  • Hyperfine structure and isotope shifts in Mo II. Rosner, S.D.; Holt, R.A. // Canadian Journal of Physics;Nov2016, Vol. 94 Issue 11, p1195 

    We have applied fast-ion-beam laser-fluorescence spectroscopy to measure the hyperfine structures of seven even-parity and six odd-parity levels in Mo II and the isotope shifts of nine transitions in the wavelength range 424.5-443.4 nm. These are the first measurements of these parameters and...

  • Mössbauer Effect Study of Eu0.88Fe4Sb12 Skutterudite. Reissner, Michael; Bauer, Ernst; Steiner, Walter; Rogl, Peter // Hyperfine Interactions;2004, Vol. 158 Issue 1-4, p211 

    The partly filled skutterudites Eu0.88Fe4Sb12 were investigated by 57Fe Mössbauer spectroscopy in the temperature range 4.2 K ≤ T ≤ 295 K and in external fields up to 13.5 T. The results favour a statistical distribution of Eu and voids in the Fe near neighbour shell. Below 82...

  • Nuclear matrix elements from direct lifetime or cross-section measurements. Werner, V.; Cooper, N.; Hinton, M.; Ilie, G.; Radeck, D. // AIP Conference Proceedings;Nov2012, Vol. 1498 Issue 1, p47 

    The method of simultaneous lifetime and g factor measurements using a plunger device and the RDDS and TDRIV techniques is introduced. Results on lifetimes and hyperfine-interaction parameters for 2+1 states in 104-108Pd, 96,98,104Ru, and 92,94Zr, using a plunger device. Another method to obtain...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics