Electron-impact ionization of Zn/sup +/ and Ga/sup +/

Journal Article · Sun Jan 31 23:00:00 EST 1982 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.25.737· OSTI ID:5651325

Rogers, W T; Stefani, G; Camilloni, R; Dunn, G H; Msezane, A Z; Henry, R J.W.

Absolute cross sections for electron-impact ionization of Zn/sup +/ and Ga/sup +/ have been measured from below threshold to 2 keV with the use of the crossed-charged-beams technique. Excitation autoionization was shown to be of major importance in both ions for the region between 1 and 2 times threshold, leading to enhancement of the cross sections by factors of up to approx.2.5. Discrepancies between experiment and the well-known semiempirical formula of Lotz were up to 70%, but reduction of Lotz's a/sub 3d/ coefficient by a factor of 2 leads to satisfactory agreement at high energies. Comparison is also made with scaled-Born-approximation calculations.

• Research Organization: Joint Institute for Laboratory Astrophysics, University of Colorado and National Bureau of Standards, Boulder, Colorado 80309
• OSTI ID: 5651325
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 25:2; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
AUTOIONIZATION
BEAMS
BORN APPROXIMATION
CHARGED PARTICLES
COLLIDING BEAMS
COLLISIONS
CROSS SECTIONS
DATA
ELECTRON COLLISIONS
ELECTRON-ION COLLISIONS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
EXPERIMENTAL DATA
GALLIUM IONS
INFORMATION
ION COLLISIONS
IONIZATION
IONS
KEV RANGE
NUMERICAL DATA
PLASMA
SCALING LAWS
ZINC IONS