Role of knockout contributions in giant resonance studies with (p ,p′ x) reactions

Carter J. ; Cowley A.A. ; Diesener H. ; Fearick R.W. ; Fortsch S.V. ; Lawrie J.J. ; Von Neumann-Cosel P. ; Pilcher J.V. ; Richter A. ; Schweda K. ; Smit F.D. ; Steyn G.F. ; Strauch S. (2001)


The giant-resonance region in 40Ca and 48Ca has been studied using the reactions 48Ca(p ,p′ n0)47Ca, 40Ca(p ,p′ p0)39K, and 40Ca(p ,p′ α0)36Ar for an incident proton energy Ep= 100 MeV. Knockout cross sections for these reactions were calculated within the distorted wave impulse approximation formalism using parameters fixed from previous investigations. The results quantitatively account for the data at higher excitation energies while the knockout contributions underneath the main resonance strength are small.

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