Observation of deeply bound pionic states of xenon produced in ${\mathrm{Xe}}_{\mathrm{nat}}{(d,}^3\mathrm{He}){\mathrm{Xe}}_{\pi -\mathrm{bound}}$ reactions

A search is reported for deeply bound pionic states of xenon produced in the ${\mathrm{Xe}}_{\mathrm{nat}}{(d,}^3\mathrm{He}){\mathrm{Xe}}_{\pi -\mathrm{bound}}$ reaction at $E_d=500\mathrm{}\mathrm{MeV}.$ In the ${}^3\mathrm{He}$ energy spectrum two peaks are observed corresponding to the production of pionic atoms in the $1s$ state.