Pion double charge exchange on the even selenium isotopes.

Abstract

Pion-induced double charge exchange (${\mathrm{\ensuremath{\pi}}}^{+}$,${\mathrm{\ensuremath{\pi}}}^{\mathrm{\ensuremath{-}}}$) on $^{76,78,80,82}\mathrm{Se}$, leading to the double isobaric analog states (DIAS) and the ground states of $^{76,78,80,82}\mathrm{Kr}$, has been studied at a laboratory angle of ${5}^{0}$ and incident pion kinetic energy of 293.2 MeV. Cross sections for these transitions have been extracted, and those for the DIAS are compared to two simple models of pion double charge exchange.