Energy spectra of charged particles emitted following the absorption of stopped negative pions in calcium

Abstract

The energy spectra of charged particles (protons, deuterons, tritons, and 3,4He nuclei) emitted following the absorption of stopped negative pions in a 0.022 g cm 2 thick target of calcium are measured from the experimental threshold energy at 2 MeV (for 3He nuclei: 8 MeV) up to the kinematical limit. The experiments are carried out at the pion channel πE3 of the Swiss Institute for Nuclear Research. The data are compared with existing measurements.