High-spin spectroscopy of sup 119,121 I: Prolate and oblate shape coexistence

Journal Article · Sun Mar 01 04:00:00 EST 1992 · Physical Review, C (Nuclear Physics); (United States)

DOI:https://doi.org/10.1103/PhysRevC.45.1041· OSTI ID:7205901

Liang, Y; Fossan, D B; Hughes, J R; LaFosse, D R; Lauritsen, T; Ma, R; Paul, E S; Vaska, P; Waring, M P; Xu, N ^[1]

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1. Department of Physics, State University of New York at Stony Brook, Stony Brook, New York 11794 (United States)

High-spin states in the odd-proton {sup 119,121}I isotopes have been studied following heavy-ion fusion-evaporation reactions using boron and carbon beams. Both prolate ({gamma}=0{degree}) and oblate ({gamma}={minus}60{degree}) collective bands have been observed built on low-lying positive- and negative-parity proton states, namely, {ital h}{sub 11/2}, {ital g}{sub 9/2}, {ital g}{sub 7/2}, and {ital d}{sub 5/2} orbitals. At the highest spins ({similar to}39/2) the collective behavior of the {ital h}{sub 11/2} yrast band is seen to break down when noncollective oblate states become yrast, resulting in the observation of band termination. The terminating state involves the {pi}{ital h}{sub 11/2}{direct product}({pi}{ital g}{sub 7/2}){sup 2}{direct product}({nu}{ital h}{sub 11/2}){sup 2} configuration at {gamma}=+60{degree}.

• OSTI ID: 7205901
• Journal Information: Physical Review, C (Nuclear Physics); (United States), Journal Name: Physical Review, C (Nuclear Physics); (United States) Vol. 45:3; ISSN 0556-2813; ISSN PRVCA
• Country of Publication: United States
• Language: English

Related Subjects

663110 -- General & Average Properties of Nuclei & Nuclear Energy Levels-- (1992-)
663560* -- Nuclear Mass Ranges-- A=90-149-- (1992-)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BORON 11 REACTIONS
CARBON 12 REACTIONS
CHARGED-PARTICLE REACTIONS
COLLECTIVE EXCITATIONS
ELECTRON CAPTURE RADIOISOTOPES
ENERGY LEVELS
ENERGY-LEVEL TRANSITIONS
EXCITATION
HEAVY ION REACTIONS
HIGH SPIN STATES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
IODINE 119
IODINE 121
IODINE ISOTOPES
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MICROSEC LIVING RADIOISOTOPES
MINUTES LIVING RADIOISOTOPES
NUCLEAR REACTIONS
NUCLEI
ODD-EVEN NUCL
ODD-EVEN NUCLEI
PARITY
PARTICLE PROPERTIES
RADIOISOTOPES
SPECTROSCOPY