Fragmentation channels of relativistic $^7$Be nuclei in peripheral interactions

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dc.creatorPeresadko, N. G.
dc.creatorLarionova, V. G.
dc.creatorAleksandrov, Yu. A.
dc.creatorGerasimov, S. G.
dc.creatorDronov, V. A.
dc.creatorKharlamov, S. P.
dc.creatorFetisov, V. N.
dc.creatorBradnova, V.
dc.creatorVokal, S.
dc.creatorZarubin, P. I.
dc.creatorZarubina, I. G.
dc.creatorKovalenko, A. D.
dc.creatorMalakhov, A. I.
dc.creatorRukoyatkin, P. A.
dc.creatorRusakova, V. V.
dc.date2006-05-15
dc.date.accessioned2026-07-07T10:42:38Z
dc.date.available2026-07-07T10:42:38Z
dc.descriptionNuclei of $^7$Li were accelerated at the JINR Nuclotron. After the charge-exchange reaction involving these nuclei at an external target a second $^7$Be beam of energy 1.23A GeV was formed. This beam was used to expose photo-emulsion chambers. The mean free path for inelastic $^7$Be interactions in emulsion $λ$=14.0$\pm$0.8 cm coincides within the errors with those for $^6$Li and $^7$Li nuclei. More than 10% of the $^7$Be events are associated with the peripheral interactions in which the total charge of the relativistic fragments is equal to the charge of the $^7$Be and in which charged mesons are not produced. An unusual ratio of the isotopes is revealed in the composition of the doubly charged $^7$Be fragments: the number of $^3$He fragments is twice as large as that of $^4$He fragments. In 50% of peripheral interactions, a $^7$Be nucleus decays to two doubly charged fragments. The present paper gives the channels of the $^7$Be fragmentation to charged fragments. In 50% of events, the $^7$Be fragmentation proceeds only to charged fragments involving no emission of neutrons. Of them, the $^3$He+$^4$He channel dominates, the $^4$He+d+p and $^6$Li+pchannels constitute 10% each. Two events involving no emission of neutrons are registered in the 3-body $^3$He+t+p and $^3$He+d+d channels. The mean free path for the coherent dissociation of relativistic $^7$Be nuclei to $^3$He+$^4$He is 7$\pm$1 m. The particular features of the relativistic $^7$Be fragmentation in such peripheral interactions are explained by the $^3$He+$^4$He 2-cluster structure of the $^7$Be nucleus.
dc.description10 pages, 3 figures, 3 tables, conference: Conference on Physics of Fundamental Interactions, Moscow, Russia, 5-9 Dec 2005
dc.identifierhttps://arxiv.org/abs/nucl-ex/0605014
dc.identifierhttp://arxiv.org/abs/nucl-ex/0605014
dc.identifierPhys.Atom.Nucl.70:1226-1229,2007
dc.identifierdoi:10.1134/S1063778807070137
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/182018
dc.subjectNuclear Experiment
dc.titleFragmentation channels of relativistic $^7$Be nuclei in peripheral interactions
dc.typetext

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