Generalized oscillator strengths for dipole-forbidden transitions in Cu I, Zn II, and Mg II

Journal Article · Mon Feb 01 04:00:00 EST 1988 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.37.988· OSTI ID:5595552

Msezane, A Z; Henry, R J.W.

Accurate electron-impact differential cross sections for various optically forbidden transitions in Cu I, Mg II, and Zn II are used to calculate apparent generalized oscillator strengths (GOS's) in the electron-impact energy range 15less than or equal toEless than or equal to100 eV. Most curves of the GOS versus momentum transfer squared, K/sup 2/, appear compatible with the Lassettre-limit theorem. Extrapolation to the optical oscillator strength values is meaningless for the 15-eV curves of Mg II and Zn II for which the unphysical region is significant. The GOS minima, where they exist, near K/sup 2/..-->..0 are extremely important in assessing whether a given transition is interpretable in terms of the Born approximation.

• Research Organization: Department of Physics, Atlanta University, Atlanta, Georgia 30314
• OSTI ID: 5595552
• Journal Information: Phys. Rev. A; (United States), Journal Name: Phys. Rev. A; (United States) Vol. 37:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
BORN APPROXIMATION
CHARGED PARTICLES
COLLISIONS
COPPER
CROSS SECTIONS
DIFFERENTIAL CROSS SECTIONS
ELECTRON COLLISIONS
ELECTRON-ATOM COLLISIONS
ELECTRON-ION COLLISIONS
ELEMENTS
EMISSION SPECTRA
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EV RANGE
EV RANGE 10-100
EXCITATION
FORBIDDEN TRANSITIONS
ION COLLISIONS
IONS
MAGNESIUM IONS
METALS
OSCILLATOR STRENGTHS
SPECTRA
TRANSITION ELEMENTS
ZINC IONS