Abstract
The new isotope 179Pb has been produced in the complete fusion reaction 40Ca + 144Sm → 179Pb+5n at the velocity filter SHIP (GSI). Its α-decay energy of 7350(20) keV and half-life value of 3.5+1.4− 0.8 ms were deduced based on the recoil–α–α correlation technique. A spin parity of Iπ = (9/2−) was tentatively assigned to the ground state of 179Pb; thus, it is based on the 1h9/2 orbital. Improved measurements of the α-decay properties of 179Tlm and 175Aum are also presented.
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