Abstract
A beam of 28 MeV 8He particles with an average intensity 2 × 105 ions s-1, produced by the SPIRAL facility at GANIL, was used to initiate fusion-evaporation reactions in thick targets of 208Pb and 209Bi. Excited states of 212Po and 213At were populated in (8He,4n) reactions. The emitted γ-rays were detected using the EXOGAM array composed of four Compton suppressed germanium Clover detectors in a close geometry configuration. Preliminary results show that 212Po has been populated to high spin (I ≃ 14) with a significantly increased yield compared with our previous 8He beam experiment. An apparently increased relative population of states up to 12+ was observed compared with published results from a 208Pb(9Be,αn)212Po reaction at 48 MeV. Evidence is presented for a previously unreported de-excitation pathway: 69 keV (13-→ 12+). States up to Iπ ≤ (39/2-) have also been observed in 213At.
Original language | English |
---|---|
Pages (from-to) | S1851-S1854 |
Journal | Journal of Physics G: Nuclear and Particle Physics |
Volume | 31 |
Issue number | 10 |
DOIs | |
Publication status | Published - 1 Oct 2005 |