T=1 states in {sup 74}Rb and their {sup 74}Kr analogs

Journal Article · Wed Nov 15 00:00:00 EST 2006 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.74.054304· OSTI ID:20864020

Fischer, S M; Lister, C J; Hammond, N J; Janssens, R V. F.; Khoo, T L; Lauritsen, T; Moore, E F; Seweryniak, D; Sinha, S; Balamuth, D P; Hausladen, P A; Sarantites, D G; Reviol, W; Chowdhury, P; Paul, S D; Baktash, C; Yu, C -H ^[1]

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1. Department of Physics, DePaul University, Chicago, Illinois 60614, USA, and Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

Charge symmetry breaking effects that perturb analog symmetry between nuclei are usually small but are important in extracting reliable Fermi matrix elements from ''superallowed'' {beta} decays and testing conserved vector current theory, especially for the heavier cases. We have used the {sup 40}Ca({sup 36}Ar, pn){sup 74}Rb and {sup 40}Ca({sup 40}Ca,{alpha}pn){sup 74}Rb reactions at 108, 123 and 160 MeV, respectively, to populate {sup 74}Rb and determine the analog distortion through comparison of T=1 states in {sup 74}Rb with their corresponding {sup 74}Kr levels. We have traced the analogs of the {sup 74}Kr ground-state band in {sup 74}Rb to a candidate spin J=8 state and determined the Coulomb energy differences. They are small and positive and increase smoothly with spin. New T=0 states were found that better delineate the deformed band structure and clarify the steps in deexcitation from high spin. A new T=0 band was found. No evidence was found for {gamma} decay to or from a low-lying J{sup {pi}}=0{sup +} state in {sup 74}Rb despite a careful search.

• OSTI ID: 20864020
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 74, Issue 5; Other Information: DOI: 10.1103/PhysRevC.74.054304; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ARGON 36
ARGON 36 REACTIONS
BETA DECAY
C INVARIANCE
CALCIUM 40
CALCIUM 40 REACTIONS
CALCIUM 40 TARGET
COMPARATIVE EVALUATIONS
COULOMB ENERGY
GAMMA DECAY
GROUND STATES
KRYPTON 74
MATRIX ELEMENTS
MEV RANGE
RUBIDIUM 74
S STATES
SPIN
SYMMETRY BREAKING
TESTING
VECTOR CURRENTS