Identification of a K isomer in 252No
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A K isomer with a half-life of (110±10) ms at an excitation energy of 1254keV has been identified in the nucleus 252No . The isomer is interpreted as a two-quasineutron state with K π = 8- . The isotope 252No was produced in the fusion-evaporation reaction 206Pb(48Ca, 2n)252No . The experiment has been performed at the velocity filter SHIP of GSI Darmstadt.
PACS.29.30.Kv X- and γ -ray spectroscopy 27.90.+b 220 ⩽ A 23.20.Lv γ transitions and level energies
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