Far Infrared Absorption Spectra in Gaseous Methane from 138 to 296 K

  • Paolo Codastefano
  • Paolo Dore
  • Luca Nencini
Part of the NATO ASI series book series (volume 127)


The rototranslational collision-induced absorption spectrum of gaseous CH4 has been measured from 40 to 600 cm-l at five different temperatures, from 138 to 296 K. Assuming that octopolar and hexa-decapolar induction mechanisms contribute to the absorption, we have derived the octopole and hexadecapole electric multipoles from the analysis of the spectral moments α and γ. We discuss the differences between our values and previous ones and we give an easy temperature interpolation of the moments of the collision-induced rototranslational methane spectra.


Spectral Shape Gaseous Methane Multipole Moment Induction Mechanism Lennard Jones 
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Copyright information

© Plenum Press, New York 1985

Authors and Affiliations

  • Paolo Codastefano
    • 1
  • Paolo Dore
    • 1
  • Luca Nencini
    • 1
  1. 1.Dipartimento di FisicaUniversità di Roma “La Sapienza”RomaItaly

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