Investigation of nuclear collectivity in the neutron mid-shell nucleus {sup 186}Pb

Journal Article · Mon Jan 15 04:00:00 EST 2007 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.75.014302· OSTI ID:20990941

Pakarinen, J ^[1]; Hellemans, V; Heyde, K ^[2]; Julin, R; Juutinen, S; Eeckhaudt, S; Enqvist, T; Grahn, T; Greenlees, P T; Jones, P; Kettunen, H; Leino, M; Leppaenen, A -P; Nieminen, P; Nyman, M; Rahkila, P; Scholey, C; Uusitalo, J ^[1]; Heenen, P -H ^[3]; Bender, M ^[4]

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1. Department of Physics, University of Jyvaeskylae, P.O. Box 35, FI-40014, Jyvaeskylae (Finland)
2. Department of Subatomic and Radiation Physics, Proeftuinstraat, 86 B-9000 Gent (Belgium)
3. Dapnia/SPhN, CEA Saclay, F-91191 Gif sur Yvette Cedex (France)
4. Department de Physique Nucleaire Theorique, Universite Libre de Bruxelles, Case Postale 229, B-1050 Bruxelles (Belgium)

For the first time, non-yrast structures of the neutron mid-shell nucleus {sup 186}Pb have been identified in an in-beam {gamma}-ray spectroscopy measurement using the recoil-decay tagging technique. The yrast band has been tentatively extended up to I{sup {pi}}=20{sup +}, revealing a similar backbend to that observed in the Pt and Hg isotones. Three new bands and several other transitions have been observed. Calculations carried out in the framework of the interacting boson model together with mean-field studies using the generator coordinate method provide arguments for the association of one of the new bands with an oblate shape. The present data also show evidence for octupole and {gamma}-vibrational bands.

• OSTI ID: 20990941
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 1 Vol. 75; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
COLLECTIVE MODEL
ENERGY-LEVEL TRANSITIONS
GAMMA SPECTRA
GAMMA SPECTROSCOPY
GENERATOR-COORDINATE METHOD
INTERACTING BOSON MODEL
ISOTONIC NUCLEI
LEAD 186
MASS NUMBER
MEAN-FIELD THEORY
MERCURY
NEUTRONS
OCTUPOLES
PLATINUM
SHELLS
VIBRATIONAL STATES
YRAST STATES