Nonstatistical effects in the C12(N15, ±) reaction

M. E. Ortiz, E. Andrade, M. Cardenas, A. Dacal, A. Menchaca-Rocha, J. L.C. Ford, J. Gomez Del Campo, R. L. Robinson, D. Shapira, E. Aguilera

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9 Scopus citations


States in Na23 were populated using the C12(N15, ±) reaction. Excitation functions were measured in the energy range Ec.m.=9.51-17.33 MeV for 41 states in Na23 from 0 to 12.2 MeV in excitation energy. Angular distributions were measured at selected energies between about 2°and 110°(c.m.). A large number of correlated resonantlike structures with 400 keV (c.m.) widths were observed in addition to statistical fluctuations in the C12(N15, ±) data. Forward peaking of the on-resonant angular distributions appear to be a signature of the excitation of high-spin states in the compound nucleus. Elastic scattering excitation functions measured at backward angles show structures which are not well correlated with the anomalies seen in the reaction channels. The C12(N15, ±) data suggest that the resonant portion of the cross sections can be attributed to the population of high-spin levels close to the yrast line of the compound nucleus. NUCLEAR REACTIONS C12(N15, ±), EN15=21.4 to 39.0 MeV, measured (E) for lab=7°; measured () for 2<~<~110°(c.m.) for selected energies; elastic scattering, EN15=22 to 31.8 MeV, measured (E) at 160.2°, 161.4°, 162.6°, 163.8°, and 165°(c.m.); measured () for 142<~<~170°(c.m.) for selected energies, fluctuation, Hauser-Feshbach and single-level analyses.

Original languageEnglish
Pages (from-to)1104-1120
Number of pages17
JournalPhysical Review C - Nuclear Physics
Issue number3
StatePublished - 1 Jan 1980
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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