Identical bands in [sup 77]Sr, [sup 78]Sr, and [sup 78]Rb: Evidence for a very good spectator orbital

Journal Article · Mon Jan 31 23:00:00 EST 1994 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.49.R580· OSTI ID:5318488

Gross, C J; Baktash, C; Cullen, D M; Cunningham, R A; Garrett, J D; Gelletly, W; Hannachi, F; Harder, A; Kabadiyski, M K; Lieb, K P; Lister, C J; Nazarewicz, W; Roth, H A; Rudolph, D; Sarantites, D G; Sheikh, J A; Simpson, J; Skeppstedt, O; Varley, B J; Warner, D D ^[1]

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1. Physics Division; Oak Ridge National Laboratory; Oak Ridge; Tennessee 37831 (United States) United Kingdom Science and Engineering Research Council; Daresbury Laboratory; Warrington WA4 4AD (United Kingdom) Physics Department; University of Surrey; Guildford GU2 5XH (United Kingdom) Centre de Spectrometrie Nucleaire et du Spectrometrie de Masse; IN2P3-Centre National de la Recherche Scientifique; Orsay (France) II. Physikalisches Institut; Universitaet Goettingen; D-37073 Goettingen (Germany) A. W. Wright Nuclear Structure Laboratory; Yale University; New Haven; Connecticut 06511 (United States) Joint Institute for Heavy Ion Research; Oak Ridge; Tennessee 37831 (United States) Department of Physics; Uni

The highest spin states in a [ital T][sub [ital z]]=1/2 nucleus have been observed in [sup 77]Sr: [ital I][sup [pi]]=(49/2[sup +]) and (29/2[sup [minus]]). In addition, states up to [ital I][sup [pi]]=(22[sup +]) have been seen in [sup 78]Sr. The [alpha]=1/2, [ital g][sub 9/2] band and both signature partners of the negative parity band in [sup 77]Sr were found to be identical to the yrast band in [sup 78]Sr with relative alignments of 1.22(7)[h bar], 0.52(5)[h bar]([alpha]=1/2), and 0.42(4)[h bar]([alpha]=[minus]1/2), respectively. In one of the negative parity bands, the identicality persists through the first proton band crossing. The odd spin decay sequence of the 4[sup [minus]] band in [sup 78]Rb is identical to the ground band of [sup 78]Sr [3.02(3)[h bar]] at low spin and to the [alpha]=1/2, [ital g][sub 9/2] band in [sup 77]Rb [1.11(3)[h bar]] at higher spins. These are the only known examples of identical bands in the neutron deficient [ital A]=80 region. The analysis indicates that the [301]3/2 Nilsson orbital is a very good spectator orbital.

• DOE Contract Number: AC05-84OR21400; FG05-87ER40361; FG02-88ER40406; FG02-91ER40609; FG05-93ER40770
• OSTI ID: 5318488
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 49:2; ISSN PRVCAN; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663220 -- Electromagnetic Transitions-- (1992-)
663450* -- Heavy-Ion-Induced Reactions & Scattering-- (1992-)
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALI METAL ISOTOPES
ALKALINE EARTH ISOTOPES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM 40 REACTIONS
CALCIUM 40 TARGET
CHARGED-PARTICLE REACTIONS
COLLECTIVE EXCITATIONS
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXCITATION
HEAVY ION FUSION REACTIONS
HEAVY ION REACTIONS
HIGH SPIN STATES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOSPIN
ISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
RUBIDIUM 78
RUBIDIUM ISOTOPES
SECONDS LIVING RADIOISOTOPES
STRONTIUM 77
STRONTIUM 78
STRONTIUM ISOTOPES
TARGETS
YRAST STATES