Elsevier

Nuclear Physics A

Volume 167, Issue 2, 24 May 1971, Pages 383-400
Nuclear Physics A

Optical-model analysis of 38 MeV 3He elastic scattering extended into the backward hemisphere

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Abstract

Angular distributions for 3He elastic scattering, have been measured to 155° at 37.7 MeV on 48Ti, 58Fe and 90Zr, and at 36.8, 37.4, 37.5 and 38.1 MeV on 58Ni. These have been analysed in terms of the optical model. Ambiguities in the real well depth and in the geometrical form of the imaginary potential have been studied. The usefulness of a surface-peaked imaginary potential, particularly in fitting the backward angle data, is indicated by these analyses. The utility of a spin-orbit term in fitting large angle data was investigated. Multiset fits were performed to the data. No conclusions concerning the necessity of either an isospin or asymmetry term in the optical potential at these energies could be drawn. Other information gained from extending 3He elastic scattering measurements into the backward hemisphere is discussed.

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    Present address: Kernfysisch Versneller Instituut, Rijksuniversiteit Groningen, The Netherlands.

    ††

    NATO Fellow on leave from Kernfysisch Versneller Instituut, Groningen.

    †††

    Permanent address: Oliver Lodge Laboratory, The University of Liverpool, Liverpool, United Kingdom.

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