High-spin yrast isomer in 211Rn and 212Rn with enhanced E3 decays

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Dracoulis, G. D.
Davidson, P. M.
Byrne, A. P.
Fabricius, B.
Kibédi, T.
Baxter, A. M.
Stuchbery, A. E.
Poletti, A. R.
Schiffer, K. J.

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New isomeric states with Jπ = 69/2+, τm = 13(1) ns in 211Rn and Jπ = 33-, πm = 7(1) ns in 212Rn have been identified. They decay by enhanced E3 transitions with strengths of 33(3) and 43(6) single particle units to the known 63/2- and 30+ isomers in 211Rn and 212Rn, respectively. The excitation energies and transition strengths agree well with predictions of the multiparticle, octupole-vibration coupled model.

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Physics Letters B

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