By using complete fusion reactions 32S + 164Er and 48Ti + 144Sm, leadingto 196Po and 192Po compound nuclei, improved α-decay characteristics for neutron-deficient 190,192Po isotopes have been obtained. The experiments have been performed at the fragment mass analyzer (Argonne) and at the RITU gas-filled separator (Jyvaskyla). In 192Po the l = 0 decay to the excited 0+ state in 188Pb is two times faster than the decay to the ground state. For 190Po more precise values of the alpha-decay energy Eα = 7545(15) keV and half-life T1/2 = 2.53(33) ms were measured. By using correlated α-decay chains α-branching ratios of 38(9)% and 9.3(8)% were experimentally deduced for the first time for 186Pb and 188Pb, respectively. The reduced α-width systematics is extended for even Po isotopes, confirming a persistence of the saturation towards the lighter isotopes. Absence of any anomalies in the reduced α-widths for the neutron-deficient Pb isotopes is confirmed.
|Original language||English (US)|
|Number of pages||3|
|Journal||Journal of Physics G: Nuclear and Particle Physics|
|State||Published - Apr 1999|
All Science Journal Classification (ASJC) codes
- Nuclear and High Energy Physics