Dracoulis, George; Davidson, Paul; Lane, Gregory; Byrne, Aidan; Kibedi, Tibor; Nieminen, Paivi; Watanabe, H; Wilson, Anna
Excited states in Fr209 have been studied using the Au197(O16,4n)Fr209 reaction with pulsed beams and I-ray and electron spectroscopy. A comprehensive scheme has been established up to an excitation energy of about 6 MeV and spins of about 49/2. Several isomers have been identified including a JÏ€=25/2+, Ï.,=48(3) ns state at 2130 keV and a 606(26) ns, 45/2- state at 4660 keV. The latter state decays via an enhanced E3 transition with a strength of 28.8(12) W.u. It can be identified with a...[Show more]
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