Properties of the intermediate structure in /sup 41/Sc

Thesis/Dissertation · Tue Jan 01 04:00:00 EST 1980

OSTI ID:5976126

Wallace, P H

Nuclear resonance structures having widths intermediate to those of compound nucleus states and single-particle states were first proposed as early as 1963. Closed shell nuclei represent the best place to test states of simple structure, so that nuclei such as /sup 41/Sc are attractive candidates for such studies. Possible intermediate structure was reported in 1974 when a cluster of seven resonances, centered about an excitation energy of 7.2 MeV in /sup 41/Sc, was observed to preferentially decay to the 3/sup -/ excited state in /sup 40/Ca. We have measured angular correlations in the /sup 40/Ca(p,p'..gamma..)/sup 40/Ca* (3.73 MeV) reaction for many of the levels in this cluster, and, in addition, we have measured analyzing power in the elastic channel between E/sub p/ = 6.0 and 6.4 MeV. These measurements determined J/sup ..pi../ = 5/2/sup +/ for the spin of 6 of the resonances which preferentially decay to the 1p-1h 3/sup -/ state in /sup 40/Ca. In order to determine the decay properties of member resonances, analyzing powers, cross sections, spin-flip asymmetries, and spin-flip probabilities have been measured in the inelastic channel for two of the strongest resonances in this structure. The resonance at E/sub p/ = 6.18 MeV was found to decay to the 3/sup -/ state in /sup 40/Ca be early pure p/sub 1/2/ decay, while the decay of the other strong resonance at E/sub p/ = 6.28 MeV was found to be a mixture of about 80% p/sub 1/2/ and 20% p/sub 3/2/ decay to the 3/sup -/ state. These results are interpreted as being evidence for a 2p-1h intermediate structure in /sup 41/Sc formed by the coupling of a 2p proton to the 3/sup -/ state in /sup 40/Ca. This result further implies that the 3/sup -/ state in /sup 40/Ca is a complex state with both lp-1h configurations and a collective component.

• Research Organization: Ohio State Univ., Columbus (USA)
• OSTI ID: 5976126
• Country of Publication: United States
• Language: English

Related Subjects

651522 -- Nuclear Properties & Reactions
A=39-58
Experimental-- Radioactive Decay-- (-1987)
651523* -- Nuclear Properties & Reactions
A=39-58
Experimental-- Energy Levels & Transitions-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALKALINE EARTH ISOTOPES
ANALYZING POWER
ANGULAR MOMENTUM
BARYON REACTIONS
BARYONS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CALCIUM 40
CALCIUM 40 TARGET
CALCIUM ISOTOPES
CHARGED-PARTICLE REACTIONS
CROSS SECTIONS
DATA
DECAY
ELEMENTARY PARTICLES
ENERGY LEVELS
ENERGY RANGE
EVEN-EVEN NUCLEI
EXPERIMENTAL DATA
FERMIONS
HADRON REACTIONS
HADRONS
INELASTIC SCATTERING
INFORMATION
INTERMEDIATE MASS NUCLEI
ISOTOPES
LEVEL WIDTHS
LIGHT NUCLEI
MEV RANGE
MEV RANGE 01-10
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
PARTICLE PROPERTIES
PROTON REACTIONS
PROTONS
RADIOISOTOPES
RESONANCE
SCANDIUM 41
SCANDIUM ISOTOPES
SCATTERING
SECONDS LIVING RADIOISOTOPES
SPIN
STABLE ISOTOPES
TARGETS