Abstract
Forward-angle differential cross sections at low energies (\ensuremath{\le}80 MeV) are reported for pion single charge exchange to the isobaric analog state for nuclei from $^{7}\mathrm{Li}$ to $^{120}\mathrm{Sn}$. A minimum in the 0\ifmmode^\circ\else\textdegree\fi{} excitation function near 50 MeV persists for all of the measured nuclei and reflects the analogous minimum in the ${\ensuremath{\pi}}^{\ensuremath{-}}p\ensuremath{\rightarrow}{\ensuremath{\pi}}^{0}n$ cross section that is caused by a nearly perfect cancellation of the $s$- and $p$-wave $\ensuremath{\pi}$-nucleon amplitudes. The persistence of this feature in these nuclei indicates a strong suppression of the net effect of the medium and constrains the interplay of the medium effects.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.