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Chronology of the three-body dissociation of 8 He

AuthorsLaurent, B.; Marqués, F.M.; Angulo, C.; Ashwood, N.I.; García Borge, María José ; Bouchat, V.; Catford, W.N.; Clarke, N.M.; Curtis, N.; Freer, M.; Hanappe, F.; Kinnard, V.; Labiche, M.; Materna, T.; McEwan, P.; Nilsson, T.; Ninane, A.; Normand, G.; Orr, N.A.; Pain, S.D.; Prokhorova, E.; Stuttgé, L.; Timis, C.
Issue Date1-Mar-2019
PublisherIOP Publishing
CitationJournal of Physics G: Nuclear and Particle Physics 46: 3 (2019)
AbstractThe space and time configurations of the dissociation of He into He+n+n, on C and Pb targets, have been explored simultaneously for the first time. The final-state interactions in the n-n and He-n channels are successfully described within a model that considers independent emission of neutrons from a Gaussian volume with a given lifetime. The dissociation on C target exhibits a dominant sequential decay through the ground state of He, consistent with neutrons being emitted from a Gaussian volume of fm with a n-n delay in the sequential channel of 1400 400 fm/c, in agreement with the lifetime of He. The lower-statistics data on Pb target correspond mainly to direct breakup, and are well described using the n-n volume measured, without any n -n delay. The validity of the phenomenological model used is discussed.
Description7 pags., 5 figs., 1 app.
Publisher version (URL)http://dx.doi.org/10.1088/1361-6471/ab02c3
Identifiersdoi: 10.1088/1361-6471/ab02c3
issn: 1361-6471
Appears in Collections:(CFMAC-IEM) Artículos
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