par Laurent, Barrallier;Marqués, Francisco Miguel;Angulo Perez, Carmen 
;Ashwood, N.I.;Borge, María José;Bouchat, Virginie;Catford, Wilton;Clarke, Nicholas;Curtis, N.;Freer, Martin;Hanappe, Francis ;Kinnard, V.;Labiche, Marc;Materna, Thomas ;McEwan, P.;Nilsson, Torbjoern;Ninane, A.;Normand, G.;Orr, Nigel;Pain, Steven;Prokhorova, E.V.;Stuttge, Louise;Timis, C.N.
Référence Journal of physics. G, Nuclear and particle physics, 46, 3, 03LT02
Publication Publié, 2019-02
;Ashwood, N.I.;Borge, María José;Bouchat, Virginie;Catford, Wilton;Clarke, Nicholas;Curtis, N.;Freer, Martin;Hanappe, Francis ;Kinnard, V.;Labiche, Marc;Materna, Thomas ;McEwan, P.;Nilsson, Torbjoern;Ninane, A.;Normand, G.;Orr, Nigel;Pain, Steven;Prokhorova, E.V.;Stuttge, Louise;Timis, C.N.Référence Journal of physics. G, Nuclear and particle physics, 46, 3, 03LT02
Publication Publié, 2019-02
Article révisé par les pairs
| Résumé : | The space and time configurations of the dissociation of 8 He into 6 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 6 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 7 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 7 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. |
