Gamow-Teller strength for the mixed ground state of sup 35 Ar via the (p,n) reaction
Early asymmetry measurements of the mixed {beta}-decay of the ground state of {sup 35}Ar to the ground state of {sup 35}Cl showed an anomalous value of G{sub V}. This anomalous value surprisingly would infer that unitary symmetry, believed to be spontaneously broken in nature, has been restored in this singular case. From the definition of {rho}{sup 2}, this anomalous value also infers a anomalous value for B(GT)/B(F). When the half-life data is used instead without the results of the asymmetry experiment, one obtains a different (normal) value of B(GT)/B(F). The quantity {rho}{sup 2} derived from the early asymmetry experiments is considered suspect. It has recently been shown that the (p,n) reaction at intermediate energies provides a strong interaction probe of the identical B(GT)/B(F) nuclear strength ratio that can be measured in {beta}-decay. The value of G{sub A}/G{sub V} has been determined very accurately from the {beta}-decay of the neutron. Thus, (p,n) can be used to determine via a totally independent measurement the value of B(GT)/B(F). The global proportionality constant E{sub O} = 55 {plus minus} 0.4 MeV is used to analyze the results of a 160 MeV Polarimeter experiment to distinguish between the normal and anomalous value. The results showed more spin-flip probability than was expected. A 120 MeV cross section experiment was required to check whether there was additional spin-flip probability due to a non-negligible {triangle}L = 2 component. The results showed a negligible {triangle}L = 2 component.
- Research Organization:
- Ohio State Univ., Columbus, OH (USA)
- OSTI ID:
- 5467444
- Resource Relation:
- Other Information: Thesis (Ph. D.)
- Country of Publication:
- United States
- Language:
- English
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NEUTRONS
STRONG INTERACTIONS
SYMMETRY BREAKING
UNITARY SYMMETRY
ARGON ISOTOPES
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BETA DECAY RADIOISOTOPES
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HADRON REACTIONS
HADRONS
INFORMATION
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NUCLEI
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651420* - Nuclear Properties & Reactions
A=20-38
Experimental