| Autor: |
V. E. Anderson, R. D. Birkhoff, L.C. Emerson, J. C. Ashley, R. H. Ritchie, Chuan-Jong Tung |
| Rok vydání: |
1977 |
| Předmět: |
|
| Zdroj: |
Physical Review B. 16:3049-3055 |
| ISSN: |
0556-2805 |
| DOI: |
10.1103/physrevb.16.3049 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
|
