Author/Authors :
F. Skaza، نويسنده , , V. Lapoux، نويسنده , , N. Keeley، نويسنده , , N. Alamanos and J.L. Sida، نويسنده , , F. Auger ، نويسنده , , D. Beaumel، نويسنده , , E. Becheva، نويسنده , , Y. Blumenfeld، نويسنده , , F. Delaunay، نويسنده , , A. Drouart، نويسنده , , A. Gillibert، نويسنده , , L. Giot، نويسنده , , E. Khan، نويسنده , , L. Nalpas، نويسنده , , A. Pakou، نويسنده , , E. Pollacco، نويسنده , , R. Raabe and P. Van Duppen، نويسنده , , P. Roussel-Chomaz، نويسنده , , K. Rusek، نويسنده , , J.-A. Scarpaci، نويسنده , , et al.، نويسنده ,
Abstract :
The structure of the light exotic nucleus 8He was investigated using direct reactions of the 8He SPIRAL beam on a proton-rich target. The (p,pʹ) scattering to the View the MathML source state, the (p,d)7He and (p,t)6He transfer reactions, were measured at the energy Elab=15.7 A.MeV. The light charged particles (p,d,t) were detected in the MUST Si-strip telescope array. The excitation spectrum of 8He was extracted from the (p,pʹ) reaction. Above the known View the MathML source excited state at 3.6 MeV, a second resonance was found around 5.4 MeV. The cross sections were analyzed within the coupled-reaction channels framework, using microscopic potentials. It is inferred that the 8He ground state has a more complex neutron-skin structure than suggested by previous α+4n models assuming a pure 4(1p3/2) configuration.
