Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV
It has been recognized for a number of years that certain spin-isospin components of the nucleon-nucleus effective interaction can be inferred from (p,n) reactions to states of known nuclear structure. For L = 0, S = 0 and L = 0, S = 1 transitions, the 0-degree (p,n) cross section can be related respectively to Fermi and Gamow-Teller beta decay matrix elements. If these transitions occur in the same nucleus, the ratio of isovector spin-flip to non-spin-flip effective interactions can be measured without regard for absolute normalization. The best reaction to measure this is /sup 14/C(p,n) which goes by a pure Gamow-Teller transition to the 1/sup /plus// state at 3.95 MeV in /sup 14/N, and Fermi transition to the 2.31 MeV 0/sup /plus// state. This work extends the ratio measurements made at lower energies (ref. 1, 2, 3) to 492 and 590 MeV. We also report on the /sup 13/C(p,n) reaction which goes by a pure GT transition to the 3.51 MeV 3/2/sup /minus// state in /sup 13/N, but by a mixed Fermi plus Gamow-Teller transition to the 1/2/sup /minus// ground state. 11 refs., 4 figs., 2 tabs.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- DOE Contract Number:
- W-7405-ENG-36
- OSTI ID:
- 6853482
- Report Number(s):
- LA-UR-88-1787; CONF-880386-8; ON: DE88014470
- Resource Relation:
- Conference: International conference on spin-observables in nuclear physics, Telluride, CO, USA, 14 Mar 1988; Other Information: Portions of this document are illegible in microfiche products
- Country of Publication:
- United States
- Language:
- English
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CARBON 13 TARGET
PROTON REACTIONS
CARBON 14 TARGET
CROSS SECTIONS
ENERGY SPECTRA
GAMOW-TELLER RULES
MATRIX ELEMENTS
TRANSITION AMPLITUDES
AMPLITUDES
BARYON REACTIONS
CHARGED-PARTICLE REACTIONS
HADRON REACTIONS
NUCLEAR REACTIONS
NUCLEON REACTIONS
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TARGETS
651320* - Nuclear Properties & Reactions
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