Abstract
An isobar-doorway model is presented for $\ensuremath{\pi}$-nucleus scattering in the (3, 3) energy region. The connection between this model and multiple-scattering and optical-model approaches is demonstrated through various approximations used in evaluating the doorway amplitude. Effective scattering amplitudes, differing from the free $\ensuremath{\pi}\ensuremath{-}N$ amplitudes as the result of nuclear effects, are suggested for use in multiple-scattering expansions. The importance of a factor ${\ensuremath{\Gamma}}^{\ensuremath{\downarrow}}$ in these amplitudes is marked. (This factor seems associated with a phenomenon analogous to collision broadening for atomic collisions.) An extension of the formalism to (${\ensuremath{\pi}}^{+}, {\ensuremath{\pi}}^{0}$) charge exchange between analog states is given.NUCLEAR REACTIONS Scattering theory for $\ensuremath{\pi}$-nucleus near (3, 3) resonance; isobar-doorway model compared with multiple-scattering techniques.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
