Two-body Photodisintegration of 4He with Full Final State Interaction
Sofia Quaglioni, Nir Barnea, Victor D. Efros, Winfried Leidemann, Giuseppina Orlandini
Abstract
The cross sections of the processes 4He(γ,p)3H and 4He(γ,n)3He are calculated taking into account the full final state interaction via the Lorentz integral transform (LIT) method. This is the first consistent microscopic calculation beyond the three--body breakup threshold. The results are obtained with a semirealistic central NN potential including also the Coulomb force. The cross sections show a pronounced dipole peak at 27 MeV which lies within the rather broad experimental band. At higher energies, where experimental uncertainties are considerably smaller, one finds a good agreement between theory and experiment. The calculated sum of three-- and four--body photodisintegration cross sections is also listed and is in fair agreement with the data.
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