ELASTIC AND INELASTIC COLLISION CROSS SECTIONS IN HYDROGEN AND DEUTERIUM FROM TRANSPORT COEFFICIENTS

Journal Article · Sun Sep 01 00:00:00 EDT 1963 · Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D

DOI:https://doi.org/10.1103/PhysRev.131.2115· OSTI ID:4677080

Engelhardt, A G; Phelps, A V

By means of a numerical solution of the Boltzmann equation, elastic and inelastic collision cross sections were derived for electrons in H/sub 2/ and D/ sub 2/ subjected to a d-c electric field. The cross sections for momentum transfer, rotational excitation, vibrational excitation, electronic excitation, and ionization are investigated by comparing experimental and theoretical values of tnansport coefficients. The same momentum transfer cross section previously ob- I tained for H/sub 2/ by Frost and Phelps has been found to be valid for D/sub 2/. Good agreement is secured between experiment and theory by multiplying the theoretical rotational cross sections of Gerjuoy and Stein by approximately 1.5, provided the polarization factor of Dalgarno and Moffett is used. The final cross section for vibrational excitation of H/sub 2/ has a threshold at 0.52 ev and a peak of 7.7 x 10/sup -17/cm/sup 2/ at 4.5 ev, whereas that of D/sub 2/ has a threshold at 0.36 ev and a peak of 6.6 x 10/sup -17/ cm/sup 2/ at 4.7 ev. The derived electronic excitation cross scctions are the same for both H/sub 2/ and D/sub 2/. The ionization cross section was taken from the experimental results of Tate and Smith. Calculated transport coefficients for electrons subjected to crossed electric and magnetic fields, and high-frequency a-c electric fields are in agreement with recent experimental and theoretical results. (auth)

• Research Organization: Westinghouse Research Labs., Pittsburgh
• NSA Number: NSA-17-034609
• OSTI ID: 4677080
• Journal Information: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D, Journal Name: Physical Review (U.S.) Superseded in part by Phys. Rev. A, Phys. Rev. B: Solid State, Phys. Rev. C, and Phys. Rev. D Vol. Vol: 131; ISSN PHRVA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BOLTZMANN EQUATION
CROSS SECTIONS
DEUTERIUM
DIFFERENTIAL EQUATIONS
ELECTRIC FIELDS
ELECTRONS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
FREQUENCY
HYDROGEN
INTERACTIONS
IONIZATION
MAGNETIC FIELDS
MEASURED VALUES
MOLECULES
MOMENTUM
NUMERICALS
PHYSICS
POLARIZATION
ROTATION
TRANSPORT THEORY
VIBRATIONS