The cross sections of the processes 4He(gamma , p)3H and 4He(gamma ,n)3He are calculated taking into account the full final state interaction via the Lorentz integral transform method. This is the first consistent microscopic calculation beyond the three-body breakup threshold. The results are obtained with a semirealistic central nucleon-nucleon 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.
Two-body photodisintegration of 4He with full final state interaction
Quaglioni, Sofia;Leidemann, Winfried;Orlandini, Giuseppina;Efros, Victor
2004-01-01
Abstract
The cross sections of the processes 4He(gamma , p)3H and 4He(gamma ,n)3He are calculated taking into account the full final state interaction via the Lorentz integral transform method. This is the first consistent microscopic calculation beyond the three-body breakup threshold. The results are obtained with a semirealistic central nucleon-nucleon 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione
