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Electron slowing-down flux spectrum in Al/sub 2/O/sub 3/

Journal Article · · Phys. Rev., B; (United States)
; ; ; ; ;
An electron slowing-down flux spectrum has been measured for ..beta.. particles, delta rays, and secondaries generated by the ..beta.. decay of neutron-activated /sup 164/Dy uniformly distributed in Al/sub 2/O/sub 3/. The energy range covered in these measurements extends from 1.5 to 32 keV. Fairly good agreement with predictions of the Spencer-Fano theory is found for energies above 10 keV. The overall shape of the spectrum is similar to that found earlier for metals and semiconductors. A companion theoretical calculation has been carried out based on cross sections for ionization of electrons from the inner shells of Al and O derived from generalized oscillator strengths, and on cross sections for valence-band electrons derived from a model-insulator theory. The effect of Auger cascade electrons is also included in the numerical solution of the electron slowing-down cascade equation. The theoretical spectra are smaller than the experimental results by as much as a factor of 4 in the energy range from 50 to 2000 eV.
Research Organization:
Health Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830
OSTI ID:
7081849
Journal Information:
Phys. Rev., B; (United States), Journal Name: Phys. Rev., B; (United States) Vol. 16:7; ISSN PLRBA
Country of Publication:
United States
Language:
English

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Related Subjects

654001* -- Radiation & Shielding Physics-- Radiation Physics
Shielding Calculations & Experiments
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AUGER EFFECT
CHALCOGENIDES
CHARGED-PARTICLE TRANSPORT
DELTA RAYS
DYSPROSIUM 164
DYSPROSIUM ISOTOPES
ELECTRONS
ELEMENTARY PARTICLES
ENERGY RANGE
EV RANGE
EVEN-EVEN NUCLEI
FERMIONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
KEV RANGE
KEV RANGE 01-10
KEV RANGE 10-100
LEPTONS
NUCLEI
OXIDES
OXYGEN COMPOUNDS
RADIATION TRANSPORT
RADIATIONS
RARE EARTH ISOTOPES
RARE EARTH NUCLEI
SLOWING-DOWN
STABLE ISOTOPES
THERMALIZATION