Coriolis-dependent Stark effect of the 2ν3 band of methane observed by saturated absorption spectroscopy

Sasada, Hiroyuki; Suzumura, Kotaro; Ishibashi, Chikako
November 1996
Journal of Chemical Physics;11/22/1996, Vol. 105 Issue 20, p9027
Academic Journal
We studied the vibration-induced dipole moment of methane by observing Stark-modulation spectra of the 2ν3 band centered at 1.66 μm. The spectral purity of an external cavity semiconductor laser and radiation density in a Fabry–Perot cavity absorption cell are sufficiently high to record sub-Doppler saturated absorption lines with a spectral resolution of 0.8 MHz. First-order Stark shifts of the E-type symmetry components in the P(2), Q(2), Q(4), Q(5), R(2), R(4), and R(5) transitions were measured, and the vibration-induced dipole moments for the v3=2 state were determined. Their values clearly demonstrate the Coriolis-induced dipole term, yielding [5.79(5)+0.440(18)×(2L-3)] mD for the JR level, where L is defined to be -(R+1), 0, and R for the R=J-1, J, and J+1 levels, R and J are rotational and total angular momentum quantum numbers, and numbers in parentheses are 90% confidence intervals in unit of the last digit. © 1996 American Institute of Physics.


Related Articles

  • Superlattice-equivalent (In,Ga)As/(In,Al)As quantum wells with large Stark shifts in the.... Leavitt, R.P.; Bradshaw, J.L. // Applied Physics Letters;4/3/1995, Vol. 66 Issue 14, p1803 

    Examines the photocurrent spectra of diode structures containing superlattice-equivalent quantum wells. Determination of exciton absorption energies; Patterns of the Stark shifts in quantum well structures; Evidence for the electrorefraction properties of multiple-quantum wells.

  • Reversible electric field induced spectral hole filling in a doped polymer film. Gu, Wei; Hanson, David M. // Journal of Chemical Physics;9/1/1988, Vol. 89 Issue 5, p2615 

    The effect of a dc electric field on persistent spectral holes in the absorption spectra of perylene doped polyvinyl butyral films has been measured. This effect is not like a typical Stark effect that is obtained with polymer films doped with polar dye molecules. Instead, a new phenomenon of...

  • Theoretical calculation of the electroabsorption spectra of polyacene crystals. Petelenz, Piotr; Slawik, Michał; Yokoi, Kohei; Zgierski, Marek Z. // Journal of Chemical Physics;9/15/1996, Vol. 105 Issue 11, p4427 

    A two-dimensional analog of the Merrifield model of the coupling between the Frenkel and charge transfer (CT) excitations of a molecular crystal is applied for the calculation of the electroabsorption (EA) spectra of polyacene crystals. The approach is essentially nonempirical, with most of the...

  • Room temperature optical absorption characteristics of GaAs/AlGaAs multiple quantum well.... Man-fang Huang; Garmire, Elsa // Applied Physics Letters;2/6/1995, Vol. 66 Issue 6, p736 

    Analyzes the use of external anisotropic strain in observing the room temperature optical absorption characteristics of gallium arsenide multiple quantum well structures. Details on heavy hole excitonic feature; Information on the presence of a larger quantum confined Stark effect; Effect of...

  • High resolution infrared absorption spectra of methane molecules isolated in solid parahydrogen... Tam, Simon; Fajardo, Mario E. // Journal of Chemical Physics;9/1/1999, Vol. 111 Issue 9, p4191 

    Studies the high resolution infrared absorption spectra of methane molecules isolated in solid parahydrogen matrices. Spectrum of the rapid vapor deposited solid; Theoretical calculations of the symmetry in hexagonal close-packed solid; Annealing of the rapid vapor deposited samples.

  • Effect of external electric field on R line absorption spectra in LiNbO[sub 3]:Cr[sup 3+] crystals. Skvortsov, A. P.; Trepakov, V. A.; Jastrabik, L. // Physics of the Solid State;Nov97, Vol. 39 Issue 11, p1835 

    The effect of an external electric field on the R absorption lines of LiNbO[sub 3]:Cr[sup 3+] crystals has been studied by a high-sensitivity differential technique at 77 K. Linear Stark effect has been observed in a field directed along the trigonal crystal axis. No effect of the field was...

  • Microwave probe for intrinsic parameters in a hybrid spin-nanoresonator system. Bin, Wen; Zhu, Ka-Di // Journal of Applied Physics;Mar2013, Vol. 113 Issue 12, p124306 

    Hybrid spin-mechanical systems are at present being actively explored for potential quantum-computing applications. In combination with the pump-probe techniques, we theoretically propose a scheme to measure the resonator frequency and coupling strength in a hybrid spin-mechanical resonator...

  • A fast-response near-infrared tunable diode laser absorption spectrometer for in situ measurements of CH[sub 4] in the upper troposphere and lower stratosphere. Richard, E.C.; Kelly, K.K.; Winkler, R.H.; Wilson, R.; Thompson, T.L.; McLaughlin, R.J.; Schmeltekopf, A.L.; Tuck, A.F. // Applied Physics B: Lasers & Optics;2002, Vol. 75 Issue 2/3, p183 

    We describe a near-infrared in situ tunable diode laser spectrometer developed for atmospheric measurements of CH[sub 4] in the upper troposphere and lower stratosphere (UT/LS). The instrument is designed to provide fast-response (0.5-1 Hz) measurements and operate autonomously on the NASA WB57F...

  • Absolute HCO concentration measurements in methane/air flame using intracavity laser spectroscopy. Lozovsky, Vladimir A.; Cheskis, Sergey; Kachanov, Alexander; Stoeckel, Fredreic // Journal of Chemical Physics;5/22/1997, Vol. 106 Issue 20, p8384 

    Discusses the use of intracavity laser absorption spectroscopy to measure the absorption spectra of a premixed, flat methane/air flame. Linewidths of the individual rotational lines in the spectrum; Rotational temperature of HCO radicals; Simultaneous measurement of radicals which is...


Read the Article


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

Try another library?
Sign out of this library

Other Topics