Structure of Be7 and Cu63 determined from the Cu63(Li6, Be7)Ni62 reaction

G. M. Hudson, K. W. Kemper, G. E. Moore, and M. E. Williams
Phys. Rev. C 12, 474 – Published 1 August 1975
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Abstract

Angular distributions have been measured for the reaction Cu63(Li6, Be0,17)Ni0,162 at E(Li6)=34 MeV in the angular range 2-52.5° (lab). Exact finite-range distorted-wave-Born-approximation (DWBA) calculations were not able to reproduce the shape of the angular distributions even though similar calculations with the same optical model parameters were able to describe the Ni62(Li7, He6)Cu63 reaction. Elastic scattering data for Li7+Ni62 and Li6+Cu63 were reanalyzed with the optical model assuming a real radius given by R=1.2AT13 instead of the previously used R=1.2(AT13+AP13). The optical model fits to the elastic scattering data and the finite-range DWBA calculations for the Ni62(Li7, He6) reaction data were equivalent with both optical parameter sets while the Cu63(Li6, Be7) fit was greatly improved. The shape of the forward angle Cu63(Li6, Be0,17)Ni062 data indicates that Be17 has a larger 1p321p12 ratio than found in the ground state of Be7. Ratios of 1p321p12 strengths in Be0,17 extracted by fitting the shape of the forward angle data with finite-range DWBA calculations of the cross sections are in excellent agreement with the calculations of Cohen and Kurath. In addition, the spectroscopic factor for Cu63 is in good agreement with values found from other reactions when the Cohen and Kurath results for Be7 are assumed. The spectroscopic factor for the component in the Cu63 ground state wave function which corresponds to Ni62(2+)2p32 has also been extracted. An upper limit for the magnitude of the cross section for the reaction Cu63(Li6, Be9) has been determined.

NUCLEAR REACTIONS Cu63(Li6, Be7) measured σ(θ) at E(Li6)=34 MeV for θ=252.5°, Δθ=2.5°. Deduced S(Ni0,162) and S(Be0,17) from finite-range DWBA analysis. Cu63(Li6, Be9) measured σ at 15, 20, and 25°.

  • Received 2 April 1975

DOI:https://doi.org/10.1103/PhysRevC.12.474

©1975 American Physical Society

Authors & Affiliations

G. M. Hudson, K. W. Kemper, G. E. Moore, and M. E. Williams

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

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Vol. 12, Iss. 2 — August 1975

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