Proton resonances in Si28 from Ex=12.5 to 13.4 MeV

R. O. Nelson, E. G. Bilpuch, C. R. Westerfeldt, and G. E. Mitchell
Phys. Rev. C 29, 1656 – Published 1 May 1984
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Abstract

The Al27(p,p) and (p,α0) differential cross sections were measured in the range Ep=0.92 to 1.85 MeV with an overall resolution of 350 to 400 eV (full width at half maximum.) Resonance parameters were extracted for 31 resonances with a multilevel, multichannel, R-matrix analysis code; these parameters include resonance energy, total angular momentum, partial elastic and inelastic widths, and channel spin and orbital angular momentum mixing ratios. Eleven analog states were identified, and the Coulomb displacement energies and spectroscopic factors were calculated. For the 2+ resonance at Ep=1.37 MeV the entrance orbital angular momentum mixing ratio was determined. The relevance of this mixing ratio to a previous test of time reversal invariance is discussed.

  • Received 19 December 1983

DOI:https://doi.org/10.1103/PhysRevC.29.1656

©1984 American Physical Society

Authors & Affiliations

R. O. Nelson, E. G. Bilpuch, and C. R. Westerfeldt

  • Duke University, Durham, North Carolina 27706
  • Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27706

G. E. Mitchell

  • North Carolina State University, Raleigh, North Carolina 27695
  • Triangle Universities Nuclear Laboratory, Duke Station, Durham, North Carolina 27706

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Issue

Vol. 29, Iss. 5 — May 1984

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