Abstract
The rotational population distribution in a free molecular jet of ethylene, C2H4, is found to be thermal over a range of distances below the nozzle (z/d=0.5−13.2, nozzle diameter d=0.50 mm). Results for on-axis rotational temperature, number density and flow velocity are presented. The average number of gas-kinetic collisions experienced by any molecule in travelling some distance along the jet axis is calculated.
Article PDF
Similar content being viewed by others
Avoid common mistakes on your manuscript.
References
F. Herlemont, M. Lyszyk, J. Lemaire, Ch. Lambeau, M. de Vleeschouwer, A. Fayt: J. Mol. Spectr. 94, 309 (1982)
A.S. Pine: Tunable Laser Survey of Molecular Air Pollutants, Final Report, NSF/ASRA/DAR 78-24562, MIT, Lexington, Mass., 1980
G. Herzberg: Molecular Spectra and Molecular Structure, Vol. II (van Nostrand Reinhold, New York 1945)
N. Dam, S. Stolte, J. Reuss: To be published
N. Dam: Thesis, Catholic University of Nijmegen, 1988
K. Veeken, N. Dam, J. Reuss: Chem. Phys. 100, 171 (1985)
K. Veeken, J. Reuss: Z. Phys. D 1, 113 (1986)
K. Veeken: Thesis, Catholic University of Nijmegen, 1985
A. Fayt: Private communication
C.H. Townes, A.L. Schawlow: Microwave Spectroscopy (Dover, New York 1975)
O.F. Hagena: Surf. Sci. 106, 101 (1981)
G.M. McClelland, K.L. Saenger, J.J. Valentini, D.R. Herschbach: J. Phys. Chem. 83, 947 (1979)
N. Dam, R. Engeln, J. Reuss, A. Fayt: To be published
R.C. Weast (ed.): Handbook of Chemistry and Physics, 59th ed. (CRC Press, West Palm Beach 1978)
R.C.L. Yuan, G.W. Flynn: J. Chem. Phys. 58, 649 (1973)
J. Häger, W. Krieger, T. Rüegg, H. Walther: J. Chem. Phys. 70, 2859 (1979)
D.M. Lubman, C.T. Rettner, R.N. Zare: J. Chem. Phys. 86, 1129 (1982)
J.B. Anderson: “Molecular Beams from Nozzle Sources”, In Molecular Beams and Low Density Gas Dynamics, ed. by P.P. Wegener (Dekker, New York 1974)
The often used empirical model of Ashkenas and Sherman can be found in Proc. 4th RGD Vol. II, ed. by J.H. de Leeuw (Academic, New York 1966) p. 84
H.C.W. Beyerinck, N.F. Verster: Physica 111C, 327 (1981)
P. Wallraff, K.M.T. Yamada, G. Winnewisser: J. Mol. Spectrosc. 126, 78 (1987)
P. Wallraff, K.M.T. Yamada, G. Winnewisser: Z. Naturforsch. 42a, 246 (1987)
H. Zacharias, M.M.T. Loy, P.A. Roland, A.S. Sudbo: J. Chem. Phys. 81, 3148 (1987)
N. Dam, C. Liedenbaum, S. Stolte, J. Reuss: Chem. Phys. Lett. 136, 73 (1987)
C.G.M. Quah, J.B. Fenn, D.R. Miller: Proc. 11th RGD, Cannes, July 3–8, 1978, pp. 885–898
R. Loudon: The Quantum Theory of Light, 2nd edn. (Clarendon Press, Oxford 1983)
M. Dang-Nhu, A.S. Pine, A. Fayt, M. de Vleeschouwer, C. Lambeau: Can. J. Phys. 61, 514 (1983)