Elastic and Inelastic Proton Scattering from Even Isotopes of Cd, Sn, and Te

W. Makofske, W. Savin, H. Ogata, and T. H. Kruse
Phys. Rev. 174, 1429 – Published 20 October 1968
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Abstract

Protons of 16-MeV energy were scattered from isotopically enriched targets of Cd110,112,114,116, Sn112,116,118,120,122,124, and Te126,128,130. Differential cross sections were measured for scattering to the 0+ ground state and the first 2+ and 3 collective states. As the mass number A increases, the elastic angular distributions shift towards smaller angles and show increasing damping. The 2+ and 3 cross sections show a systematic decrease in magnitude with increasing A. Optical-model calculations were made by fixing the geometrical parameters for each set of isotopes and searching on V and WD, the real and surface imaginary parts of the optical potential. The observed trends, systematically increasing with A, are consistent with an isospin dependence in the real and imaginary parts of the optical potential. The distorted-wave program dwuck, assuming a collective vibrational model, was run using complex coupling and Coulomb excitation in order to extract deformation parameters βl for all the 2+ and 3 states. These parameters indicate that the decrease in inelastic scattering with increasing A is associated with a decreasing collectivity for each set of isotopes. The values of βl are in reasonable agreement with deformation parameters extracted by other methods.

  • Received 18 April 1968

DOI:https://doi.org/10.1103/PhysRev.174.1429

©1968 American Physical Society

Authors & Affiliations

W. Makofske, W. Savin, H. Ogata*, and T. H. Kruse

  • Department of Physics, Rutgers, The State University, New Brunswick, New Jersey

  • *On leave from Kyoto University, Japan.

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Vol. 174, Iss. 4 — October 1968

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