THE ν2 RAMAN BAND OF METHANE
- 1 March 1955
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Physics
- Vol. 33 (3-4) , 138-145
- https://doi.org/10.1139/p55-018
Abstract
The doubly degenerate ν2 Raman band of methane was photographed at a gas pressure of 2 atm. with a reciprocal linear dispersion of 10.5 cm.−1 per mm. An analysis of the O and S branches gave ν0 = 1533.6, B0 = 5.270, and B1 = 5.392 cm.−1. When the Raman data are combined with the infrared data of Burgess, Bell, and Nielsen, the effect of the Coriolis interaction of ν2 with ν4 is seen to be a splitting of the rotational levels of the upper vibrational state of ν2 into two sets, each of which can be represented by an effective value of B1. The Raman O, S and the infrared P (strong), Q, R (weak) transitions terminate in states with B1 = 5.392 cm.−1; the Raman P, Q, R and the infrared P (weak), R (strong) transitions terminate in states with B1 = 5.322 cm.−1.Keywords
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