Abstract
An isomeric state in Lr255 with a half-life of t1/2 = 1.4(1) ms and Ex>720-keV has been observed for the first time using the GABRIELA setup at the focal plane of the VASSILISSA separator. Based on its K-forbiddeness, the configuration of the state is most probably formed by coupling the valence proton to a two quasiparticle neutron excitation. Possible three quasiparticle configurations are discussed.Received 31 December 2007DOI:https://doi.org/10.1103/PhysRevC.78.021302©2008 American Physical Society
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