Structure des systèmes non liés 10;12Li et 13Be

Abstract : The unbound systems 10;12Li and 13Be have been studied via nucleon removal from a 14B beam of 35 MeV/nucleon. The invariant mass (decay energy) spectra were reconstructed from the measured 9;11Li-n and 12Be-n coincidences. Simulations, taking into account the effects of the experimental setup and the reaction, were developed. The reconstructed decay energy spectra were interpreted using theoretical lineshapes folded with the experimental response, as well as uncorrelated distributions obtained from the data by event mixing. In the case of 10Li, the data were reproduced with an s-wave virtual state of scattering length (foumule) confirming the v1p1=2 - v2s1=2 inversion. For 12Li, evidence was found for excited states between 0:2 and 0:8 MeV above the threshold. In the case of 13Be, the decay energy, as well as the other observables, were reproduced assuming an (formule). This hypothesis is supported by the selectivity of proton knockout, whereby the neutron configuration of the states populated in 13Be should directly reflect that of 14B.
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Nuclear Experiment. Université de Caen, 2011. French


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G. Randisi. Structure des systèmes non liés 10;12Li et 13Be. Nuclear Experiment. Université de Caen, 2011. French. <tel-00656582>

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