Relativistic and electron correlation effects in neon and argon. [40 keV]

Journal Article · Sat Jan 01 04:00:00 EST 1977 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.15.112· OSTI ID:7130511

Fink, M; Moore, P G

The differential cross sections for electrons scattered from atoms are determined in the first Born approximation by the Fourier transform of the sum of the first- (times 2Z) and the second-order density matrix elements. When scattered intensities are measured with high accuracy, features such as electron correlation and relativistic effects can be studied. In the present experiment using 40-keV electrons, a precision of 0.1% in the count rates and 2 arc sec in the scattered angle has been achieved in the angular range of 7 to 200 mrad. The experimental data are matched at large scattering angles to theoretical cross sections based on Hartree--Fock potentials. The deviations between theory and experiment at small angles are discussed with respect to changes in the first- and second-order densities based on configuration-interaction wave functions. (AIP)

• Research Organization: Physics Department and Electronics Research Center, The University of Texas, Austin, Texas 78712
• OSTI ID: 7130511
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 15:1; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ARGON
ATOM COLLISIONS
BORN APPROXIMATION
COLLISIONS
CONFIGURATION INTERACTION
CORRELATIONS
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON CORRELATION
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
HARTREE-FOCK METHOD
KEV RANGE
KEV RANGE 10-100
NEON
NONMETALS
RARE GASES
RELATIVISTIC RANGE
SCATTERING