Gamma decay of high-spin states in /sup 47/Ti

Journal Article · Thu Jul 01 04:00:00 EDT 1976 · Phys. Rev., C; (United States)

DOI:https://doi.org/10.1103/PhysRevC.14.109· OSTI ID:7363098

Meyer-Schutzmeister, L; Hardie, G; Sjoreen, T

The compound nucleus reaction /sup 45/Sc(..cap alpha..,np..gamma..)/sup 47/Ti was used to confirm the high spins of states, observed previously in the (..cap alpha..,d) reaction, by studying their ..gamma.. decay. Measurements of ..gamma..-..gamma.. coincidences, ..gamma..-ray excitation functions, and ..gamma..-ray angular distributions for several target thicknesses have been performed. These measurements allowed us to determine the energies and the spins for some of the observed levels, as well as the branching ratios and the multipolarities for the emitted ..gamma.. rays. Lifetimes for a few states were deduced from the Doppler shifts which were exhibited in the angular distributions. Shell-model calculations were made assuming an inert /sup 40/Ca core and all active nucleons in the 1f/sub 7///sub 2/ shell. Agreement between the measured and calculated branching ratios and multipolarities is excellent for all the yrast levels, and even the lifetimes of these states are predicted rather well by the theory. For two other levels, at 2.684- and 3.289-MeV energy, disagreement between the measured and calculated ..gamma.. decay is observed. The lifetime of the lower of these two states was found to be unusually slow for an M1 transition. This result suggests that perhaps the earlier spin assignments for both states are wrong. For the 2.684-MeV state a spin of either 7/2/sup +/ or 11/2/sup +/ is in agreement with all the available experimental data. (AIP)

• Research Organization: Argonne National Laboratory, Argonne, Illinois 60439
• OSTI ID: 7363098
• Journal Information: Phys. Rev., C; (United States), Journal Name: Phys. Rev., C; (United States) Vol. 14:1; ISSN PRVCA
• Country of Publication: United States
• Language: English

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73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALPHA REACTIONS
ANGULAR DISTRIBUTION
BARYONS
BRANCHING RATIO
CHARGED-PARTICLE REACTIONS
COMPOUND-NUCLEUS REACTIONS
DECAY
DISTRIBUTION
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
ENERGY-LEVEL TRANSITIONS
EVEN-ODD NUCLEI
FERMIONS
GAMMA SPECTROSCOPY
HADRONS
INTERMEDIATE MASS NUCLEI
ISOTOPES
LIFETIME
MATHEMATICAL MODELS
MEV RANGE
MEV RANGE 10-100
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
PROTONS
SCANDIUM 45 TARGET
SHELL MODELS
SPECTROSCOPY
STABLE ISOTOPES
TARGETS
TITANIUM 47
TITANIUM ISOTOPES