Small-angle (e/sup -/, Na) scattering in the 6--25-eV range

Journal Article · Sat Sep 01 04:00:00 EDT 1984 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.30.1255· OSTI ID:6350826

Jaduszliwer, B; Weiss, P; Tino, A; Bederson, B

We have investigated elastic and inelastic scattering of electrons by sodium atoms at intermediate energies (6--25 eV) by the atomic-recoil technique, using a new atomic-beams apparatus. The effects of the apparatus geometry, atomic velocity, and electron energy distributions on the analysis of the experimental results have been examined in detail, and their effects on small-angle scattering have been incorporated into the present work. We present absolute measurements of the elastic (e/sup -/, Na) differential cross section at 10 eV for electron polar angles ranging between 12/sup 0/ and 22/sup 0/. These measurements are in good agreement with the normalized results of S. K. Srivastava and L. Vuskovic (J. Phys. B 13, 2633 (1980)) and in reasonable agreement with the two-state close-coupling calculation of M. R. Issa (Ph.D. thesis, University of Durham, 1977). We also present absolute measurements of an integral over small angles of the 3 /sup 2/P impact-excitation differential cross section, together with a precise prescription for comparison with theory. We found that the distorted-wave--polarized-orbital calculation of J. V. Kennedy, V. P. Myerscough, and M. R. C. McDowell (J. Phys. B 10, 3759 (1977)) gives results which are too high in the forward direction, while those of Issa are somewhat low.

• Research Organization: Physics Department, New York University, New York, New York 10003
• OSTI ID: 6350826
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 30:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALI METALS
ATOM COLLISIONS
COLLISIONS
CROSS SECTIONS
ELASTIC SCATTERING
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY RANGE
EV RANGE
EV RANGE 01-10
EV RANGE 10-100
INELASTIC SCATTERING
METALS
RECOILS
RESOLUTION
SCATTERING
SMALL ANGLE SCATTERING
SODIUM
SPATIAL RESOLUTION