Spherical And Deformed Structures In 189Pb

Journal Article · Tue Apr 05 04:00:00 EDT 2005 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.1905292· OSTI ID:20630877

Baxter, A M ^[1]; Dracoulis, G D; Kibedi, T; Davidson, P M ^[2]; Byrne, A P ^[1]; Janssens, R V.F.; Carpenter, M P; Davids, C N; Khoo, T L; Lauritsen, T ^[3]

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1. Physics Department, Faculty of Science, Australian National University, Canberra ACT 0200 (Australia)
2. Department of Nuclear Physics, RSPhysSE, Australian National University, Canberra ACT 0200 (Australia)
3. Physics Division, Argonne National Laboratory, Argonne, IL 60439 (United States)

Gamma-ray spectroscopy of high-spin states of the neutron-deficient nucleus 189Pb has been conducted with the 158Gd(36Ar,5n) and 164Er(29Si,4n) reactions. With the first of these, detection of evaporation residues and mass gating were used to unambiguously assign a number of prompt {gamma} ray transitions to 189Pb. With the second reaction and a pulsed beams, an isomer with a mean life of 32 {mu}sec was found and the decay scheme below it established. Although inconclusive, the available evidence favours identification of the isomer with the (33/2){sup +} state of the v(i13/2)-3 configuration. The levels observed below the isomer can be identified with states involving three different structures: the neutron (i13/2)-3 multiplet in the spherical well; a prolate-deformed band involving mixed i13/2 neutron orbitals; and a state with the oblate {pi}(2p-2h)0+ x v(i13/2)-1 configuration.

• OSTI ID: 20630877
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 764; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 36 REACTIONS
DEFORMED NUCLEI
ENERGY-LEVEL TRANSITIONS
ERBIUM 164 TARGET
EVAPORATION MODEL
GADOLINIUM 158 TARGET
GAMMA RADIATION
GAMMA SPECTROSCOPY
HIGH SPIN STATES
LEAD 189
LIFETIME
NEUTRON-DEFICIENT ISOTOPES
NUCLEAR STRUCTURE
SILICON 29 REACTIONS