Experimental survey of the (d→,t) reaction at Ed=200 MeV

J. Van de Wiele, H. Langevin-Joliot, F. Jourdan, J. Guillot, E. Gerlic, L. H. Rosier, A. Willis, C. Djalali, M. Morlet, E. Tomasi-Gustafsson, N. Blasi, S. Micheletti, and S. Y. van der Werf
Phys. Rev. C 50, 2935 – Published 1 December 1994
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Abstract

Differential cross sections, vector and tensor analyzing powers of the (d→,t) reaction on Sn120, Sn116, Zr90, Ni58, O16, and C12 have been measured at 200 MeV bombarding energy. Deuteron elastic scattering measurements have been performed on Sn116 and Pb208 at the same energy. These data have been analyzed together with previous ones on Ni58 and O16 to get best fit optical parameters describing deuteron elastic scattering. The (d→,t) experimental survey bears on 28 transitions populating well known valence levels, including previous data in Pb207 and Si27. The vector and tensor analyzing powers exhibit striking similarities for transitions measured in different nuclei. The angular distributions are found to strongly depend on the number of nodes in the neutron form factor and on the coupling of spin and angular momentum j=l-1/2 versus j+=l+1/2. The j effect is especially pronounced, for both analyzing powers for n=1 transitions. The slopes of the differential cross sections in different nuclei depend mainly on the number of nodes. Exact finite range calculations including S and D components have been performed, using two sets of deuteron parameters together with a deep triton potential. Both analyses reproduce rather well the differential cross sections and currently adopted spectroscopic factors. The conventional analyses with deuteron parameters fitting elastic scattering data reproduce rather well analyzing powers of n>1 transitions (with l=0,1,2), but disagree with the data for n=1 transitions (except for j+Ayy values). Good or qualitative agreement is achieved for all transitions with the second deuteron potential, characterized by larger spin orbit terms and an additional imaginary tensor term. This allows using the reaction as a spectroscopic tool.

  • Received 22 July 1994

DOI:https://doi.org/10.1103/PhysRevC.50.2935

©1994 American Physical Society

Authors & Affiliations

J. Van de Wiele, H. Langevin-Joliot, F. Jourdan, J. Guillot, E. Gerlic, L. H. Rosier, A. Willis, C. Djalali, M. Morlet, E. Tomasi-Gustafsson, N. Blasi, S. Micheletti, and S. Y. van der Werf

  • Institut de Physique Nucléaire, IN2P3-CNRS, BP No. 1, 91406 Orsay, France
  • Institut de Physique Nucléaire, IN2P3-CNRS, 43 Boulevard du 11 Novembre, 69622 Lyon-Villeurbanne, France
  • Department of Physics Astronomy, University of South Carolina, Columbia, South Carolina 29208
  • Laboratoire National Saturne, CEN-Saclay, F 91191, Gif sur Yvette, France
  • INFN and University of Milan, Physics Department, Via Celoria 16, 20133 Milan, Italy
  • Kernfysisch Versneller Instituut, 9747 AA Groningen, The Netherlands

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Vol. 50, Iss. 6 — December 1994

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