Izvorni znanstveni članak
The utility of Compton scattering in determination of electron momentum density
Z. Kaliman
; Faculty of Philosophy, University of Rijeka, 51000 Rijeka, Croatia
T. Surić
; R. Bošković Insitute, P. O. Box 180, HR-10002 Zagreb, Croatia
K. Pisk
; R. Bošković Insitute, P. O. Box 180, HR-10002 Zagreb, Croatia
R. H. Pratt
; Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, U. S. A.
Sažetak
We present new insights regarding the validity of the impulse approximation (IA) in determining electron momentum density (EMD) from Compton scattering. These insights are obtained utilizing the code we have recently developed for the full calculation of the triple differential cross-section (TDCS) for Compton scattering. We find that, due to the averaging, at lower energies IA is more accurate for the double differential cross-section (DDCS) than for TDCS. We conclude that at such energies an EMD determination from the DDCS is more accurate than its direct determination through the measurement of the TDCS at the same energy. We also discuss the validity of IA for calculations of other less averaged Compton observables.
Ključne riječi
Compton scattering; electron momentum density; impulse approximation; double differential cross-section; triple differential cross-section
Hrčak ID:
301053
URI
Datum izdavanja:
2.4.2000.
Posjeta: 206 *