Octupole collectivity in the Sm isotopes

Journal Article · Thu Dec 15 04:00:00 EST 2005 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PhysRevC.72.064302· OSTI ID:20771079

Babilon, M ^[1]; Zamfir, N V ^[1]; Kusnezov, D ^[2]; McCutchan, E A ^[1]; Zilges, A ^[3]

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1. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520-8124 (United States)
2. Sloane Physics Laboratory, Yale University, New Haven, Connecticut 06520-8120 (United States)
3. Institut fuer Kernphysik, Technische Universitaet Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt (Germany)

Microscopic models suggest the occurrence of strong octupole correlations in nuclei with N{approx_equal}88. To examine the signatures of octupole correlations in this region, the spdf interacting boson approximation model is applied to Sm isotopes with N=86-92. The effects of including multiple negative-parity bosons in this basis are compared with more standard one negative-parity boson calculations and are analyzed in terms of signatures for strong octupole correlations. It is found that multiple negative-parity bosons are needed to describe properties at medium spin. Bands with strong octupole correlations (multiple negative-parity bosons) become yrast at medium spin in {sup 148,150}Sm. This region shares some similarities with the light actinides, where strong octupole correlations were also found at medium spin.

• OSTI ID: 20771079
• Journal Information: Physical Review. C, Nuclear Physics, Journal Name: Physical Review. C, Nuclear Physics Journal Issue: 6 Vol. 72; ISSN 0556-2813; ISSN PRVCAN
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACTINIDES
APPROXIMATIONS
CORRELATIONS
DEFORMED NUCLEI
INTERACTING BOSON MODEL
OCTUPOLES
PARITY
SAMARIUM 150
SPIN
YRAST STATES