Strong interaction andE2effect in even-Aantiprotonic Te atoms

The x-ray cascade from antiprotonic atoms was studied for ${}^{122}\mathrm{Te}$, ${}^{124}\mathrm{Te}$, ${}^{126}\mathrm{Te}$, ${}^{128}\mathrm{Te}$, and ${}^{130}\mathrm{Te}$. Widths and shifts due to the strong interaction were deduced for several levels. The $E2$ nuclear resonance effect was observed in all investigated nuclei. In ${}^{130}\mathrm{Te}$ the $E2$ resonance allowed to determine level widths and shifts of the $LS$-split deeply bound $(n,l)=(6,5)$ state, otherwise unobservable. The measured level widths and shifts, corrected for the $E2$-resonance effect, were used to investigate the nucleon density in the nuclear periphery. The deduced neutron distributions are compared with results of the previously introduced radiochemical method and with Hartree-Fock-Bogoliubov model calculations.