6533b850fe1ef96bd12a8249
RESEARCH PRODUCT
α-decay of the new isotopePo187: Probing prolate structures beyond the neutron mid-shell at N = 104
Mark HuyseS. R. LesherP. Van DuppenJ. J. ResslerPasi KuusiniemiDieter AckermannBettina LommelRobert PageSigurd HofmannB. SulignanoRamon WyssKatsuhisa NishioR. MannS. AntalicS. FranchooA. N. AndreyevA. N. AndreyevS. SaroI. KojouharovB. StreicherG. MünzenbergD. R. WisemanF. P. HeßbergerBirgit Kindlersubject
Nuclear reactionPhysicsNuclear and High Energy Physics010308 nuclear & particles physics01 natural sciencesExcited state0103 physical sciencesPotential energy surfaceNeutronAlpha decayAtomic physics010306 general physicsGround stateEnergy (signal processing)Radioactive decaydescription
The new neutron-deficient isotope $^{187}\mathrm{Po}$ has been identified in the complete fusion reaction $^{46}\mathrm{Ti}$+$^{144}\mathrm{Sm}$\ensuremath{\rightarrow}$^{187}\mathrm{Po}$+$3n$ at the velocity filter SHIP. Striking features of the $^{187}\mathrm{Po}$ \ensuremath{\alpha} decay are the strongly-hindered decay to the spherical ground state and unhindered decay to a surprisingly low-lying deformed excited state at 286 keV in the daughter nucleus $^{183}\mathrm{Pb}$. Based on the potential energy surface calculations, the $^{187}\mathrm{Po}$ ground state and the 286 keV excited state in $^{183}\mathrm{Pb}$ were interpreted as being of prolate origin. The systematic deviation of the \ensuremath{\alpha}-decay properties in the lightest odd-A Po isotopes relative to the smooth behavior in the even-A neighbors is discussed. Improved data for the decay of ${}^{187}{\mathrm{Bi}}^{m,g}$ were also obtained.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-04-25 | Physical Review C |