Fine structure in a alpha decay of 188, 192Po
Van de Vel, K., Andreyev, A. N., Ackermann, D., Boardman, H. J., Cagarda, P., Gerl, J., . . . Wyss, R. (2003). Fine structure in a alpha decay of 188, 192Po. Physical Review C : Nuclear Physics, 68 (5), 054311. doi:10.1103/PhysRevC.68.054311
Published inPhysical Review C : Nuclear Physics
Gerl, J. |
Saro, S. |
© 2003 The American Physical Society
The α decay of 188,192Po has been reexamined in order to probe the 0+ states in the daughter nuclei 184,188Pb that can be associated with coexisting spherical, oblate, and∕or prolate configurations. Improved values were measured for the excitation energy and the feeding α-decay intensity of the 0+2state in 184,188Pb and conflicting results on the 0+3 state in 188Pb were clarified. All known cases of fine structure in the α decay of the even-even Po nuclei are reviewed. The reduced α-decay width systematics combined with potential-energy-surface calculations confirm the onset of deformation in the ground state of the polonium nuclei around the neutron midshell. An isomeric state with a half-life of 580(100)ns has been identified in 192Po.