Electron-induced neutron knockout from $^{4}$He

A. Misiejuk , Z. Papandreou , E. Voutier (1) , Th.S. Bauer , H.P. Blok , D.J. Boersma , H.W. den Bok , E.E.W. Bruins , F. Farzanpay , K. Gruener (1) , W.H.A. Hesselink , G.M. Huber , E. Jans , N. Kalantar-Nayestanoki , W.J. Kasdorp , J. Konijn , J.M. Laget , L. Lapikas , G.J. Lolos , G.J.G. Onderwater , A. Pellegrino , R. Schroevers , C.M. Spaltro , R. Starink , G. van Der Steenhoven , J.J.M. Steiger , J.L. Visschers , H.W. Willering , D.M. Yeomans

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

The differential cross section for electron-induced neutron knockout in the reaction 4He(e,e′n)3He has been measured for the first time with a statistical accuracy of 11%. The experiment was performed in quasielastic kinematics at a momentum transfer of 300  MeV/c and in the missing-momentum range of 25–70  MeV/c. The comparison of the data with theoretical calculations shows an impressive increase of the cross section resulting from final state interaction effects. Specifically , the p−n charge-exchange process dominates the cross section in this kinematical regime. (APS)

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

A. Misiejuk, Z. Papandreou, E. Voutier, Th.S. Bauer, H.P. Blok, et al.. Electron-induced neutron knockout from $^{4}$He. Physical Review Letters, 2002, 89, pp.172501. ⟨10.1103/PhysRevLett.89.172501⟩. ⟨in2p3-00011980⟩