Elsevier

Nuclear Physics A

Volume 105, Issue 2, 11 December 1967, Pages 678-688
Nuclear Physics A

Coupled channel analysis of proton scattering from 19F

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Abstract

Elastic and inelastic differential cross sections measured for protons of incident energies 4.26, 5.96 and 6.87 MeV scattered from 19F are analysed using the adiabatic coupled channel (ACC) approximation. The scattering to the first two, positive-parity states (12+ and 52+) of the ground state rotational band are considered, the excitation of negative-parity states being negligibly weak. Using a quadrupole deformation β=0.37 determined from Coulomb excitation measurements, good fits to the 12+ and 52+ state differential cross sections are obtained by varying only the surface absorption potential with energy, all other parameters being fixed. Comparison with a spherical, optical-model analysis of the same data shows that the latter model overestimates the spin-orbit potential by a factor of 3 compared with the value obtained from the ACC analysis. The effect is related to the large deformation.

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    Research sponsored in part by the Air Force Office of Scientific Research, Office of Aerospace Research, United States Air Force, under AFOSR Grant No. AF-AFOSR-440-67 and the National Science Foundation (Grant NSF-GP-5114), and by the U.S. Atomic Energy Commission under contract with Union Carbide Corporation.

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