Elsevier

Nuclear Physics A

Volume 128, Issue 1, 28 April 1969, Pages 47-72
Nuclear Physics A

(3He, α) reactions on the chromium isotopes

https://doi.org/10.1016/0375-9474(69)90978-6Get rights and content

Abstract

The reactions 50,52,53,54Cr(3He, α)49,51,52,53Cr have been studied at an incident energy of 18 MeV using a broad-range magnetic spectrograph as well as solid state detectors. Angular distributions were obtained for all isotopes. The relative isotopic cross sections were accurately determined by measurements with a target of mixed Cr isotopes. Coulomb energy displacements are obtained from the observation of f72, d32 and s12 analogue states at excitation energies between 5 and 13 MeV. The spectroscopic factors from a DWBA analysis give information about the neutron configurations in the Cr isotopes which are discussed in the particle-hole excitation picture and in terms of the unified model. Centres of gravity for the f72, d32, and s12 orbits are determined. The spectroscopic factors of the analogue states are obtained from solutions of the Lane equations for the bound states using a surface-type isospin potential. In a simplified analysis, the effects of the surface potential are simulated by varying the bound-state radii, keeping the depth of the potential constant for the ifT < and T> states. These procedures yield similar results, which are in agreement with the sum-rule predictions. The resulting radii suggest that the inner nucleons occupy a volume smaller than that corresponding to a potential radius R = 1.25 A13.

References (40)

  • R. Bock et al.

    Nucl. Phys.

    (1965)
  • V.P. Bochin

    Nucl. Phys.

    (1964)
    R. Trilling et al.

    MIT-Report No. NYO 10063

    (1963)
  • J.G. McGrory

    Phys. Rev.

    (1967)
  • J.N. Ginocchio

    Phys. Rev.

    (1966)
  • C.D. Jeffries

    Phys. Rev.

    (1953)
  • D. Bachner
  • R. J. Philpott, W. T. Pinkston and G. R. Satchler, to be...
  • G.A. Bartholomew et al.

    Can. J. Phys.

    (1964)
  • R. N. Glover and A. D. W. Jones, private...
  • C. Maples et al.

    Nucl. Data

    (1966)
  • R. Sherr

    Phys. Lett.

    (1967)
  • S. Sen Gupta

    Nucl. Phys.

    (1960)
  • R. Bock et al.

    Nucl. Phys.

    (1967)
  • J.E. Robertshaw et al.

    Phys. Rev.

    (1968)
  • W. Fitz et al.

    Z. Phys.

    (1967)
  • C.A. Whitten et al.

    Phys. Rev.

    (1967)
  • C.A. Whitten

    Phys. Rev.

    (1967)
  • J.D. McCullen et al.

    Phys. Rev.

    (1964)
  • I. Talmi

    Phys. Rev.

    (1962)
  • K. Ramavataram

    Phys. Rev.

    (1963)
  • Cited by (0)

    View full text