Systematics of giant resonances in the electron-impact ionization of heavy atoms and ions: Ionization of the 4d subshell

Journal Article · Mon Jun 01 00:00:00 EDT 1987 · Phys. Rev. A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.35.4567· OSTI ID:5948307

Younger, S M

Giant resonances in the electron-impact ionization cross section of the 4d subshell in heavy atoms and ions are studied as a function of the nuclear charge, the ionicity of the atom, and the presence of localized excited-state orbitals. The results of distorted-wave Born-exchange-approximation calculations are presented for the singly charged ions Ag/sup +/--Ce/sup +/ and for the first four ions of the barium isonuclear sequence and the iodine isoelectronic sequence. Giant resonances were found to occur only for neutral atoms and singly charged ions with Zapprox. >53. The cross sections for ionization of several ions were found to be very sensitive to the scattering exchange approximation. The effect of valence shell excitations into localized 4f states in Sb/sup +/, Ba/sup 2+/, and La/sup +/ is studied. Such controlled changes in target ion charge density can have significant effects on the formation and structure of giant resonances in electron scattering from heavy ions.

• Research Organization: A-Division, Lawrence Livermore National Laboratory, Livermore, California 94550
• OSTI ID: 5948307
• Journal Information: Phys. Rev. A; (United States), Vol. 35:11
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ANTIMONY IONS
ELECTRON-ION COLLISIONS
BARIUM IONS
CERIUM IONS
INNER-SHELL IONIZATION
LANTHANUM IONS
SILVER IONS
ATOMIC NUMBER
CROSS SECTIONS
DWBA
ELECTRON-ATOM COLLISIONS
GIANT RESONANCE
ISOELECTRONIC ATOMS
MULTICHARGED IONS
ATOM COLLISIONS
ATOMS
BORN APPROXIMATION
CHARGED PARTICLES
COLLISIONS
ELECTRON COLLISIONS
ION COLLISIONS
IONIZATION
IONS
RESONANCE
640304* - Atomic
Molecular & Chemical Physics- Collision Phenomena