New excited 2+ and 3- two-proton states in Po126 84210 populated by two-proton transfer

Five new 2+ levels have been established in the semimagic Po210 nucleus from a ²⁰⁸Pb(¹²C, ¹⁰Be) two-proton transfer experiment, performed at energies close to the Coulomb barrier at JAEA Tokai. A setup combining Ge, LaBr3, and Si telescopes was used to detect both in-beam γ rays and ejectile residues. The new 2+ states have been established by means of the transitions toward the 0+ ground state which are present in the γ spectra produced by properly selecting the excitation energy in Po210 after kinematical reconstruction. (f_7/2)², h_9/2 ⊗ - f_5/2, (i_13/2)², f_7/2 ⊗ - p_3/2, and f_7/2 ⊗ - f_5/2 two-proton configurations are assigned to these states. In addition, a new 3- level has also been established in this nucleus, very likely originating from the f_7/2 ⊗ - i_13/2 configuration. Shell-model calculations strongly support these assignments. .