New excited 2(+) and 3(-) two-proton states in Po-210(84)126 populated by two-proton transfer

Five new 2(+) levels have been established in the semimagic Po-210 nucleus from a (208)pb(C-12, Be-10) 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 gamma 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 gamma spectra produced by properly selecting the excitation energy in Po-210 after kinematical reconstruction. (f(7/2) )(2), h(9/2) circle times f(5/2), (i(13/2))(2), f(7/2) circle times p(3/2), and f(7/2) circle times 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) circle times i(13/2) configuration. Shell-model calculations strongly support these assignments.