Collective oblate bands in [sup 196]Pb

Journal Article · Thu Apr 01 00:00:00 EST 1993 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.47.R1337· OSTI ID:6643984

Hughes, J R; Liang, Y; Janssens, R V.F.; Kuhnert, A; Becker, J A; Ahmad, I; Bearden, I G; Brinkman, M J; Burde, J; Carpenter, M P; Cizewski, J A; Daly, P J; Deleplanque, M A; Diamond, R M; Draper, J E; Duyar, C; Fornal, B; Garg, U; Grabowski, Z W; Henry, E A ; Henry, R G; Hesselink, W; Kalantar-Nayestanaki, N; Kelly, W H; Khoo, T L; Lauritsen, T; Mayer, R H; Nissius, D; Oliveira, J R.B.; Plompen, A J.M.; Reviol, W; Rubel, E; Soramel, F; Stephens, F S; Stoyer, M A; Vo, D; Wang, T F ^[1]

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1. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States) Argonne National Laboratory, Argonne, Illinois 60439 (United States) Purdue University, West Lafayette, Indiana 47907 (United States) Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States) Rutgers University, New Brunswick, New Jersey 08903 (United States) Physics Department, University of California, Davis, California 95616 (United States) University of Notre Dame, Notre Da

Evidence for collective oblate behavior in [sup 196]Pb is presented. One irregular and two regular bands of [ital M]1 transitions have been observed following the [sup 170]Er([sup 30]Si,4[ital n]) and [sup 176]Yb([sup 26]Mg,6[ital n]) reactions. Transitions linking the most intense regular band to the low-lying negative-parity yrast levels are observed, establishing excitation energies, spins, and probable parities of the band members. In contrast, no such transitions have been found for the irregular band and the weaker regular band. The bands are interpreted as corresponding to collective oblate rotation, arising mainly from deformation-aligned high-[ital j], shape-driving quasiproton excitations across the [ital Z]=82 shell gap, coupled to rotation-aligned quasineutrons.

• DOE Contract Number: W-7405-ENG-48; AC03-76SF00098; W-31109-ENG-38; FG02-87ER40346
• OSTI ID: 6643984
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Vol. 47:4; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ERBIUM 170 TARGET
SILICON 30 REACTIONS
LEAD 196
COLLECTIVE EXCITATIONS
YTTERBIUM 176 TARGET
MAGNESIUM 26 REACTIONS
M1-TRANSITIONS
NEUTRONS
NUCLEAR DEFORMATION
PARITY
SPIN
YRAST STATES
ANGULAR MOMENTUM
BARYONS
BETA DECAY RADIOISOTOPES
CHARGED-PARTICLE REACTIONS
DEFORMATION
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EXCITATION
FERMIONS
HADRONS
HEAVY ION REACTIONS
HEAVY NUCLEI
ISOTOPES
LEAD ISOTOPES
MINUTES LIVING RADIOISOTOPES
MULTIPOLE TRANSITIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PARTICLE PROPERTIES
RADIOISOTOPES
TARGETS
663220* - Electromagnetic Transitions- (1992-)
663580 - Nuclear Mass Ranges- A=190-219- (1992-)