Elastic and vibrationally inelastic cross sections and energy loss spectra for electron collisions with GeH4
- 28 September 1993
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 26 (18) , 3147-3158
- https://doi.org/10.1088/0953-4075/26/18/021
Abstract
Absolute vibrationally elastic cross sections for e-GeH4 collisions have been determined for electrons of 1, 2, 2.5, 3, 5, 7.5, 10, 15, 20, 60 and 100 eV incidence energy over a scattering angular range of 10 degrees -130 degrees . The observed angular distributions correspond, at least qualitatively, to theoretical formulations using the continuum-multiple-scattering method, the parameter-free static-exchange-polarization approximation, and a multichannel Schwinger variational calculation. Vibrational excitation functions and the energy distribution of elastically scattered electrons reveal a shape resonance at about 2-2.5 eV. Calculations show that the resonance scattering state belongs to the t2 representation of the Td point group, which is also the representation of the lowest unoccupied molecular orbital (LUMO) of GeH4. Energy loss spectra recorded in the electronic threshold region of GeH4 reveal enhanced inelastic scattering at large angles in the loss range 7-9 eV characteristic of excitation to the lowest triplet state.Keywords
This publication has 25 references indexed in Scilit:
- Rational function fits to the nonresonant elastic differential cross sections (DCS) for e + He collisions, 0°–180°, 0.1 to 1000 eVPublished by Elsevier ,2004
- Elastic DCS for e+CH4collisions, 1.5-100 eVJournal of Physics B: Atomic, Molecular and Optical Physics, 1991
- Vibrational excitation of ethane by electron impactJournal of Physics B: Atomic, Molecular and Optical Physics, 1990
- Theoretical study of GeHn, AsHn, and SeHn: Ionization energiesThe Journal of Chemical Physics, 1990
- Modified operation of the seven-element electrostatic Chutjian–Kuyatt lens systemReview of Scientific Instruments, 1988
- The total cross section for low-energy electron scattering from kryptonJournal of Physics B: Atomic and Molecular Physics, 1987
- AB initio vibrational analysis of the Schumann—Runge bands and the neighboring absorption region of molecular oxygenChemical Physics Letters, 1976
- Experimental investigation and phase shift analysis of low-energy electron-helium scatteringJournal of Physics B: Atomic and Molecular Physics, 1975
- An efficient numerical multicenter basis set for molecular orbital calculations: Application to FeCl4The Journal of Chemical Physics, 1973
- Studies of absorption spectra of GeH4 in the 2–17 μ regionJournal of Molecular Spectroscopy, 1972