Isospin Mixing In Compound Nuclear Reactions: A Study In The 11b(p, N)11c System At Ep = 14.3 Mev

The elastic enhancement factor in charge-exchange reactions proceeding via the compound nucleus, predicted to attain the value of 2 in the weak isospin mixing regime by Harney, Weidenmüller and Richter five years ago, is tested here in the system 11B(p, n)11C at 〈Ep〉 = 14.3 MeV. Both the DWBA and Hauser-Feshbach calculations employed in the analysis are used in a way which physically simulates a two coupled-channels model. Our results show an enhancement factor larger than 1 indicating that isospin is mainly conserved in this reaction. © 1986.4583397411Grimes, Anderson, Kerman, Wong, (1972) Phys. Rev., 5 C, p. 85Robson, Richter, Harney, (1973) Phys. Rev., 8 C, p. 153Robson, Richter, Harney, (1975) Phys. Rev., 11 C, p. 1867Harney, Weidenmüller, Richter, (1977) Phys. Rev., 16 C, p. 1774Weidenmüller, Richter, Harney, (1978) Phys. Rev., 18 C, p. 1953Harney, Weidenmüller, Richter, (1980) Phys. Lett., 96 B, p. 227Kretschmer, Wangler, (1978) Phys. Rev. Lett., 41, p. 1224Wylie, Pessoa, Cybulska, Schelin, Fagundes, Nakayama, Douglas, (1979) Nucl. Instr. Meth., 164, p. 293Schelin, Pessoa, Wylie, Cybulska, Nakayama, Douglas, (1984) Nucl. Phys., 414 A, p. 67Schelin, Pessoa, Wylie, Cardoso, Jr., Douglas, (1985) Nucl. Sci. Eng., 89, p. 87Richard, Preparation of targets by a centrifugal method (1979) Nuclear Instruments and Methods, 167, p. 97Sugai, (1977) Nucl. Instr. Meth., 145, p. 409Thompson, (1972) Thesis, , unpublishedWatson, Singh, Segel, (1969) Phys. Rev., 182, p. 977R. Schaeffer and J. Raynal, computer code DWBA70, updated by W.G. Love, unpublishedBertsch, Borysowicz, McManus, Love, (1977) Nucl. Phys., 284 A, p. 399Petrovich, Howell, Poppe, Austin, Crawley, (1982) Nucl. Phys., 383 A, p. 355Lee, Kurath, (1980) Phys. Rev., 21 C, p. 293F. Petrovich and A. Carpenter, private communicationGrimes, Anderson, Davis, Howell, Wong, Carpenter, Carr, Petrovich, (1985) Phys. Rev. C, , private communicationAgassi, Weidenmüller, Mantzouranis, (1975) Phys. Lett., 22 C, p. 145Yamaguchi, Nagata, Matsuda, Optical Model Potential in the Lowest Order Brueckner Theory and Complex Effective N-N Interaction (1983) Progress of Theoretical Physics, 70, p. 459de Jager, De Vries, De Vries, (1974) At. Data Nucl. Data Tables, 14, p. 479Mann, (1978) computer code HAUSER-5, , unpublishedPerey, Perey, (1976) At. Data Nucl. Data Tables, 17, p. 1B.H. Wildenthal, private communicatio