Spectroscopy of 212Po and 213At using a 8He radioactive beam and EXOGAM

A. B. Garnsworthy*, N. J. Thompson, Zs Podolyák, P. M. Walker, S. J. Williams, G. D. Dracoulis, G. De France, G. J. Lane, K. Andgren, A. M. Bruce, A. P. Byrne, W. N. Catford, B. Cederwall, G. A. Jones, B. McGuirk, S. Mandal, E. S. Paul, V. Pucknell, N. Redon, B. RosseR. J. Senior, G. Sletten

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    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 languageEnglish
    Pages (from-to)S1851-S1854
    JournalJournal of Physics G: Nuclear and Particle Physics
    Volume31
    Issue number10
    DOIs
    Publication statusPublished - 1 Oct 2005

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