Absolute elastic differential electron scattering cross sections in the intermediate energy region. I. H2
- 15 September 1975
- journal article
- conference paper
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 63 (6) , 2659-2665
- https://doi.org/10.1063/1.431659
Abstract
A new method for measuring absolute electron‐impact differential cross sections (DCS) for elastic scattering in gases is described. The technique uses a well‐defined crossed‐beam scattering geometry in which the relative target densities of an unknown and a secondary standard gas are accurately determined by a calibrated flowmeter and a pressure gauge. The method is applied to the measurement of elastic scattering from H2 (which, in the present work, also includes rotational excitation) relative to elastic scattering from He, the secondary standard. The relative DCS for H2 are then placed on the absolute scale by using recently measured absolute elastic DCS for He. Measurements for H2 are reported at incident electron energies of 3–75 eV, and in the angular range 20°–135°. Differential and integral cross sections at each energy are compared with previous measurements and recent theoretical calculations.Keywords
This publication has 24 references indexed in Scilit:
- Experimental investigation and phase shift analysis of low-energy electron-helium scatteringJournal of Physics B: Atomic and Molecular Physics, 1975
- Differential elastic scattering of electrons by the rare gases. I. HeliumJournal of Physics B: Atomic and Molecular Physics, 1975
- The velocity distribution of atoms issuing from a multi-channel glass capillary array and its implication on the measurement of atomic beam scattering cross sectionsJournal of Physics B: Atomic and Molecular Physics, 1972
- Molecular Beam Sources Fabricated from Multichannel Arrays. IV. Speed Distribution in the Centerline BeamJournal of Applied Physics, 1970
- Differential Cross Sections for the Elastic Scattering of 1- to 95-eV Electrons from HeliumPhysical Review A, 1970
- Molecular Beam Sources Fabricated from Multichannel Arrays. III. The Exit Density ProblemJournal of Applied Physics, 1970
- Molecular-Beam Sources Fabricated from Multichannel Arrays. II. Effect of Source Size and AlignmentJournal of Applied Physics, 1969
- Molecular-Beam Sources Fabricated from Multichannel Arrays. I. Angular Distributions and Peaking FactorsJournal of Applied Physics, 1969
- Absolute Differential Cross Sections of Elastically Scattered Electrons. I. He, N2, and CO at 500 eVThe Journal of Chemical Physics, 1969
- Molecular Beam Formation by Long Parallel TubesJournal of Applied Physics, 1960