The new isotope Pb-179 has been produced in the complete fusion reaction Ca-40+Sm-144 -> Pb-179+5n at the velocity filter SHIP (GSI). Its alpha-decay energy of 7350(20) keV and half-life value of 3.5(-0.8)(+1.4) ms were deduced based on the recoil-alpha-alpha correlation technique. A spin parity of I-pi = (9/2(-)) was tentatively assigned to the ground state of Pb-179; thus, it is based on the 1h(9/2) orbital. Improved measurements of the alpha-decay properties of Tl-179(m) and Au-175(m) are also presented.
|Article number||ARTN 035102|
|Number of pages||10|
|Journal||Journal of physics g-Nuclear and particle physics|
|Publication status||Published - Mar 2010|
- SHAPE COEXISTENCE
- Z=82 SHELL CLOSURE
- NEUTRON-DEFICIENT ISOTOPES