On an Expression for the Total Cross Section
Open Access
- 1 March 1954
- journal article
- Published by Oxford University Press (OUP) in Progress of Theoretical Physics
- Vol. 11 (3) , 288-290
- https://doi.org/10.1143/ptp.11.288
Abstract
The well-known expression for the total cross section in terms of the imaginary part of the coherent forward scattered amplitude is derived in a simple and general way from wave theory. The derivation also shows that there is a “;shadow remnant”; beyond the actual shadow, within which the forward coherent scattering intensity is diminished, of approximate radius (r/k)1/2, where r is the distance from the scattering center and k=2π/λ is the wave number. A qualitative understanding of the shadow remnant is obtained in terms of the uncertainty principle.Keywords
This publication has 0 references indexed in Scilit: