Mechanism of excitation of two-electron--one-photon K x rays in heavy-ion collisions

Journal Article · Thu Sep 01 04:00:00 EDT 1977 · Phys. Rev., A; (United States)

DOI:https://doi.org/10.1103/PhysRevA.16.964· OSTI ID:7214248

Greenberg, J S; Vincent, P; Lichten, W

The energy dependence of the cross sections for both the K..cap alpha.. (one-electron, one-photon) and K..cap alpha cap alpha.. (two-electron, one-photon) x-ray emissions for Ni-Ni collisions have been measured in the energy range 17.6--91.5 MeV. To account for these observations, we have extended the electron promotion model to the quantitative, ab initio calculation of double K-shell vacancies. The results furnish, for the first time, an independent test of both the Briggs-Macek formulation of the electron promotion model and the concept of velocity-dependent exit channels suggested by Fastrup et al. We also present, for the first time, a theory of the vacancy-sharing mechanism for double K-shell excitation in symmetric systems. The theoretical results are in quantitative agreement with experiment.

• Research Organization: Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520
• OSTI ID: 7214248
• Journal Information: Phys. Rev., A; (United States), Journal Name: Phys. Rev., A; (United States) Vol. 16:3; ISSN PLRAA
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOMIC IONS
BEAMS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRONIC STRUCTURE
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EXCITATION
ION BEAMS
ION COLLISIONS
ION-ION COLLISIONS
IONIZATION
IONS
K SHELL
MEV RANGE
MEV RANGE 10-100
NICKEL IONS
SPECTRA
X-RAY SPECTRA