Mirror states in A=15 from 60-MeV Li6-induced reactions on C12

H. G. Bingham, M. L. Halbert, D. C. Hensley, E. Newman, K. W. Kemper, and L. A. Charlton
Phys. Rev. C 11, 1913 – Published 1 June 1975
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Abstract

Analog pairs of states have been observed simultaneously with counter telescopes by using the C12(Li6, t) and C12(Li6, He3) reactions for E(Li6)=60 MeV at excitation energies of 10.45-10.73, 12.84-13.15, and 15.05-15.49 MeV in O15-N15, respectively. Magnetic spectrograph data for the C12(Li6, t)O15 reaction having an energy resolution of 50 keV versus the 200 keV resolution of the counter systems show that single states are being strongly excited at 10.45, 12.84, and 15.05 MeV in O15. Elastic and inelastic scattering data have also been taken in the angular range from 10 to 120° c.m. with Δθ2°. Optical model parameters were extracted from the elastic scattering data, and quadrupole deformation lengths were obtained from a coupled-channels analysis of the inelastic scattering data to the 2+, 4.43-MeV state in C12. Exact finite-range distorted-wave Born-approximation calculations for the transfer reactions yield a range of L transfers for each of the analog states which are consistent with the assumption that these states have spins Jf92.

NUCLEAR REACTIONS C12(Li6, Li0,1,26), (Li6, He3-t) E=60 MeV; measured σ(θ); deduced optical model parameters; coupled-channels calculations, deduced β2; identified mirror states in O15-N15; deduced range of L transfers for each mirror state from finite range DWBA analyses.

  • Received 11 February 1975

DOI:https://doi.org/10.1103/PhysRevC.11.1913

©1975 American Physical Society

Authors & Affiliations

H. G. Bingham*, M. L. Halbert, D. C. Hensley, and E. Newman

  • Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830

K. W. Kemper and L. A. Charlton

  • Department of Physics, The Florida State University, Tallahassee, Florida 32306

  • *Deceased 8 April 1974. The other authors of this work express gratitude for having had the opportunity to have Hans Bingham as a colleague.
  • Work supported by Union Carbide under contract with the U. S. Atomic Energy Commission.
  • Work supported in part by the National Science Foundation under Grants Nos. NSF-GP-25974, NSF-GU-2612, NSF-GP-41834X, and NSF-GJ-367.

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Vol. 11, Iss. 6 — June 1975

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