Electron-impact ionization of Be/sup +/

Journal Article · Mon Jan 31 23:00:00 EST 1983 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.27.754· OSTI ID:6238567

Falk, R A; Dunn, G H

The electron-impact ionization cross section for Be/sup +/ has been measured from threshold to 1600 eV with an absolute uncertainty of 8%. The cross section has a peak value of 46.5 x 10/sup -18/ cm/sup 2/ at an energy of approx.50 eV, and structure ascribed to the excitation autoionization of the 1s2s2p state at 118.5 eV is observed. Calculations using the semiempirical formula of Lotz for direct ionization and the semiempirical effective Gaunt-factor formula for excitation autoionization give summed cross-section values which agree well with the experiment over the entire energy range. Comparisons are also made with other calculations and cross sections in the literature.

• Research Organization: Joint Institute for Laboratory Astrophysics, National Bureau of Standards and University of Colorado, Boulder, Colorado 80309
• OSTI ID: 6238567
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 27:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METALS
ATOM COLLISIONS
AUTOIONIZATION
BERYLLIUM
COLLISIONS
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELEMENTS
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
INFORMATION
IONIZATION
METALS
NUMERICAL DATA