Author/Authors :
M. Meister، نويسنده , , L.V. Chulkov، نويسنده , , H. Simon، نويسنده , , T. Aumann، نويسنده , , M.J.G. Borge، نويسنده , , Th.W. Elze، نويسنده , , H. Emling، نويسنده , , H. Geissel، نويسنده , , M. Hellstrom، نويسنده , , B. Jonson، نويسنده , , J.V. Kratz، نويسنده , , R. Kulessa، نويسنده , , Y. Leifels، نويسنده , , K. Markenroth، نويسنده , , S. Hofmann and G. Münzenberg، نويسنده , , F. Nickel، نويسنده , , T. Nilsson، نويسنده , , G. Nyman، نويسنده , , V. Pribora، نويسنده , , A. Richter، نويسنده , , et al.، نويسنده ,
Abstract :
The unbound hydrogen isotopes 4,5H have been studied in the one-proton knockout channel of 6He (240 MeV/u) impinging on a carbon target. The triton fragments originating from this channel were detected in coincidence with neutrons. Relative energy spectra as well as energy and angular correlations have been studied for the t+n and t+n+n systems. The analysis of the energy and angular correlations by the method of hyperspherical harmonic expansion allows to determine the relative weights of the most relevant partial waves in the three-body t+n+n final state. It is shown that the neutrons to a large extent occupy the p-shell and that the Iπ=1/2+ state is strongly populated as expected for the 5H ground state. No evidence for a narrow resonance in the t+n+n system is obtained, instead a broad structure peaked at 3 MeV above the threshold with about 6 MeV as a full width at half maximum is observed. The two-body t+n system reveals a resonance compatible with earlier results for 4H.
Keywords :
2nt) , 4 , E=240 MeV/nucleon , 5H deduced , resonance features , Measured , Hyperspherical harmonic expansion analysis , Nuclear reactions , C(6He , (6He , triton and neutron relative energy spectra , Comparisons with previous results , nt) , energy and angular correlations
