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- W1988795526 abstract "Experimental data on the momentum distribution in the fragmentation of a 240 MeV/u 6 He beam on a carbon target are compared with several models of the 6 He nucleus based on different physical assumptions. It is shown that the lack of a strict theoretical description of the fragmentation mechanism and, in particular, of the final state interaction prevents any contra or versa arguments for these models. The requirement of fragment ( 5 He) survival or spatial localization of a fragment in the 6 He wave function is an essential point in the reaction mechanism. The analysis of the 5 He momentum (sum of the neutron and the α-particle momenta) distribution is free from the effect of final state interaction and thus more promising. It is shown that due to the requirement of fragment survival this distribution is determined mainly by the asymptotic of the 6 He wave function. Large sensitivity to the outer part of the halo structure gives a unique possibility to estimate the admixture of s -waves in the ground states of 11 Li and 14 Be directly from the momentum distribution of 10 Li (in fragmentation of 11 Li) and from the momentum distribution of 13 Be (in fragmentation of 14 Be). The shell structure of these nuclei is of great interest in understanding the neutron-halo properties." @default.
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- W1988795526 date "1998-09-01" @default.
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- W1988795526 title "Manifestation of the halo structure in momentum distributions from 6He fragmentation" @default.
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- W1988795526 doi "https://doi.org/10.1016/s0375-9474(98)00442-4" @default.
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