Study of Energy Transfer in Methane by Excitation of Fundamental, Overtone, and Combination Bands

  • Peter Hess
  • C. Bradley Moore
Conference paper
Part of the Springer Series in Chemical Physics book series (CHEMICAL, volume 6)


The relaxation of combination and overtone excitations in methane is shown to proceed rapidly via nearly resonant vibration- to- vibration (V → V) transfers. An angle-tuned optical parametric oscillator with 3 to 10 mJ/pulse was employed [1] to excite different vibrational levels of CH4 in the 1.66 – 3.55 μ region. To probe level populations fluorescence intensity vs time was observed for the infrared active υ3 and υ4 modes. A filter cell containing CH4 absorbed fundamental, v3, 4 = 1 → 0, fluorescence and passed hot-band fluorescence. Thus upper levels could be distinguished from the fundamentals.


Vibrational Level Combination Band Filter Cell Millisecond Timescale Versus Transfer 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    R. L. Herbst, R. N. Fleming, and R. L. Byer, Appl. Phys. Lett., 25, 520 (1974).ADSCrossRefGoogle Scholar
  2. [2]
    P. Hess and C. B. Moore, to be published.Google Scholar
  3. [3]
    J. T. Yardley and C. B. Moore, J. Chem. Phys., 49, 1111 (1968).ADSCrossRefGoogle Scholar
  4. [4]
    P. Hess and C. B. Moore, J. Chem. Phys., 65, 2339 (1976).ADSCrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1979

Authors and Affiliations

  • Peter Hess
    • 3
  • C. Bradley Moore
    • 1
    • 2
  1. 1.Department of ChemistryUniversity of CaliforniaBerkeleyUSA
  2. 2.Materials and Molecular Research Division of the Lawrence Berkeley LaboratoryBerkeleyUSA
  3. 3.Institut fur Physikalische Chemie der Universitat HeidelbergHeidelberg 1Deutschland

Personalised recommendations