Study of Cross-Section Fluctuations for Li6 + C12 Reactions

T. G. Dzubay
Phys. Rev. 158, 977 – Published 20 June 1967
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Abstract

Differential cross-section measurements for Li6+C12 reactions are presented in 100-keV steps between 2.4 and 8.5 MeV at 0° and in 200-keV steps between 3.4 and 7.4 MeV at 40° (lab). Fluctuations in the cross sections are observed at all energies, but they are superimposed upon a rapid rise in cross section for beam energies below 4 MeV due to the Coulomb barrier effects. Coulomb barrier effects are accounted for by calculating the average differential cross section from the Hauser-Feshbach formula in which the transmission coefficients are determined from an optical-model potential. The ratios of the observed-to-calculated cross sections fluctuate about an almost constant value. These ratios are analyzed in terms of the Ericson fluctuation theory from which the coherence width is estimated to be Γ0=250 keV (c.m.). The average cross-section ratio for the C12(Li6,α1)N14 reaction indicates a 30% violation of isobaric-spin conservation in the 3.4- to 6.0-MeV interval.

  • Received 27 October 1966

DOI:https://doi.org/10.1103/PhysRev.158.977

©1967 American Physical Society

Authors & Affiliations

T. G. Dzubay*

  • School of Physics and Astronomy, University of Minnesota, Minneapolis, Minnesota

  • *Present address: Palmer Physical Laboratory, Princeton University, Princeton, New Jersey.

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Issue

Vol. 158, Iss. 4 — June 1967

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