Roles of Pauli correlations, channel couplings, and shake-off in ion-induced KL/sup v/ and K/sup 2/L/sup v/ multiple-vacancy production

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:6858293

Becker, R L; Ford, A L; Reading, J F

Cross sections for target K-plus-L-shell multiple-vacancy production by ions can be inferred from experimental measurements of K x-ray and Auger satellite intensities. The theory of K/sup n/L/sup v/ multiple-vacancy distributions has been generalized from the single-particle model (the statistically independent electron approximation) to the independent Fermi particle model. The Pauli correlations (electron exchange terms) are found to nearly cancel in many cases because of a tendency toward random phases. This results in the first quantal demonstration that the vacancy distribution is nearly binomial (but slightly narrower). Calculations have been generalized from the traditional first-order approximations to unitary approximations (first Magnus and coupled-channels) which correctly predict the saturation of the mean vacancy probability with increasing projectile charge. The recent availability of satellite and hypersatellite data for the same collision system makes possible the beginning of an investigation of the effects of increased removal energies and increased shaking in hypersatellites (K/sup 2/L/sup v/) as compared with satellites. We review our unified treatment of ion-plus-shaking induced amplitudes for L-vacancy production accompanying ion-generated K-holes. Calculations for C/sup 6 +/ + Ne satellite and hypersatellite vacancy distributions are presented.

• Research Organization: Oak Ridge National Lab., TN (USA); Texas A and M Univ., College Station (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6858293
• Report Number(s): CONF-8308173-4; ON: DE84016564
• Country of Publication: United States
• Language: English

Related Subjects

640304* -- Atomic
Molecular & Chemical Physics-- Collision Phenomena
74 ATOMIC AND MOLECULAR PHYSICS
ATOM COLLISIONS
AUGER ELECTRON SPECTROSCOPY
CARBON IONS
CHARGED PARTICLES
COLLISIONS
CROSS SECTIONS
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
FLUIDS
GASES
ION COLLISIONS
ION-ATOM COLLISIONS
IONS
K SHELL
L SHELL
MULTICHARGED IONS
NEON
NONMETALS
PAULI PRINCIPLE
RARE GASES
SPECTROSCOPY
X-RAY SPECTROSCOPY