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Spin Flip 1+ Excitations by Inelastic Hadron Scattering

  • G. P. A. Berg
  • W. Hürlimann
  • I. Katayama
  • S. A. Martin
  • J. Meissburger
  • F. Osterfeld
  • J. G. M. Römer
  • B. Styczen
  • J. Tain
  • G. Gaul
  • R. Santo
  • G. Sondermann

Abstract

In this contribution we report on inelastic hadron scattering experiments to 1+ spin flip states in 48Ca, 58Ni and 208Pb using the high resolution spectrometer BIG KARL at the Jülich cyclotron facility. Experimental and theoretical investigations of spin flip excitations in nuclei are stimulated by the perspective to obtain information on the nature of the spin \(\left( {\vec \sigma \vec \sigma } \right)\) and spin-isospin \(\left( {\vec \sigma \,\,\vec \sigma {\kern 1pt} \vec \tau \,\,\vec \tau } \right)\) parts of the residual particle-hole (ph) interaction which in the Landau-Migdal parametrisation1,2, can be written as:
$${F_{ph}}\left( {{{\vec r}_1} - {{\vec r}_2}} \right) = {C_o}\left( {{g_o}{{\vec \sigma }_1}{{\vec \sigma }_2} + {g_o}{{\vec \sigma }_1}{{\vec \sigma }_2}{{\vec \tau }_1}{{\vec \tau }_2}} \right)\delta \left( {{{\vec r}_1} - {{\vec r}_2}} \right);$$
(1)
The magnitude of the force strength parameter go’ which describes the short range spin-isospin correlations is intimately related to the experimentally observed quenching of the total Ml- and Gamow-Teller (GT) strength. For this reason spin excitations in nuclei are presently investigated experimentally by many groups using preferably highly selective reactions like (p,n) charge exchange3, inelastic electron scattering4,5 at backward angles and nuclear resonance fluorescence with polarized photons (γ,γ’)6.

Keywords

Inelastic Electron Scattering4 DWBA Calculation Spin Flip Transition Deuteron Spectrum High Orbital Angular Momentum 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • G. P. A. Berg
    • 1
  • W. Hürlimann
    • 1
  • I. Katayama
    • 1
  • S. A. Martin
    • 1
  • J. Meissburger
    • 1
  • F. Osterfeld
    • 1
  • J. G. M. Römer
    • 1
  • B. Styczen
    • 1
  • J. Tain
    • 1
  • G. Gaul
    • 2
  • R. Santo
    • 2
  • G. Sondermann
    • 2
  1. 1.Institut für KernphysikKernforschungsanlage JülichJülichWest Germany
  2. 2.Institut für KernphysikUniversität MünsterMünsterWest Germany

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