ISSN:
1434-601X
Quelle:
Springer Online Journal Archives 1860-2000
Thema:
Physik
Notizen:
Abstract Excited states in199,200,201Po were populated in the reactions12C+194Pt and12C+195Pt. The subsequentγ-radiation was studied using conventional in-beam spectroscopic methods. States with spins up to (29/2), 18 and ≧35/2ħ, respectively, were populated in the three nuclides. Three isomeric states with the following half-lives were observed in200Po:T 1/2(8+)=90(15) ns,T 1/2(11−)=120(20) ns andT 1/2(12+)=267(4) ns. The structure of the excited states was interpreted within the framework of the spherical shell model. The three isomers are suggested to be two-quasiparticle states with configurationsπ(h 2 2)8J, π(h9i13/2)11- and v(i 1 3/2 −2)12+. A self-consistent Hartree-Fock calculation was performed to obtain ground-state deformations of the neighbouring Pb cores. From the results of the experiments and the calculations it was concluded that no appreciable deformations of the cores are manifested in the yrast states of these three Po nuclei.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1007/BF01493443
