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Title: Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV

Abstract

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.

Authors:
; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
6853482
Report Number(s):
LA-UR-88-1787; CONF-880386-8
ON: DE88014470
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
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
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; 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; SPECTRA; TARGETS; 651320* - Nuclear Properties & Reactions, A=6-19, Experimental

Citation Formats

Ullmann, J L, Rapaport, J, Lisowski, P W, Byrd, R C, Carey, T, Taddeucci, T N, McClelland, J, Rybarcyk, L, Haight, R C, and King, N S.P. Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV. United States: N. p., 1988. Web.
Ullmann, J L, Rapaport, J, Lisowski, P W, Byrd, R C, Carey, T, Taddeucci, T N, McClelland, J, Rybarcyk, L, Haight, R C, & King, N S.P. Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV. United States.
Ullmann, J L, Rapaport, J, Lisowski, P W, Byrd, R C, Carey, T, Taddeucci, T N, McClelland, J, Rybarcyk, L, Haight, R C, and King, N S.P. 1988. "Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV". United States. https://www.osti.gov/servlets/purl/6853482.
@article{osti_6853482,
title = {Ratio of Gamow-Teller to Fermi strength observed in /sup 13,14/C(p,n) at 492 and 590 MeV},
author = {Ullmann, J L and Rapaport, J and Lisowski, P W and Byrd, R C and Carey, T and Taddeucci, T N and McClelland, J and Rybarcyk, L and Haight, R C and King, N S.P.},
abstractNote = {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.},
doi = {},
url = {https://www.osti.gov/biblio/6853482}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

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