An isotope of the 113th element, 278113, were produced by the 209Bi(70Zn, n) reaction using gas-filled recoil ion separator (GARIS). Three decay chains originating from 278113 were observed. Two of them consisted of four consecutive alpha decays followed by spontaneous fission (SF). One consisted of six consecutive alpha decays. These were assigned to the decay, 278113(alpha) --> 274Rg(alpha) --> 270Mt(alpha) --> 266Bh(alpha) --> 262Db(SF/alpha) --> 258Lr(alpha) -->. The reaction 248Cm + 48Ca was studied using GARIS. Five decay chains terminated by SF were observed. The decay properties of the chains agree well with the chains observed, and assigned to 292Lv and 293Lv, at Dubna and at GSI in the same reaction. Possible new alpha decay branch of 284Cn and subsequent SF of possible new isotope 280Ds were observed.
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- September 2014