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статья/документ по запросу ресурса "4416"
DOI: 10.1134/S1063778817040044 7 P. Physics of Atomic Nuclei, 2017, Vol. 80, No. 4, pp. 650–656 A two-particle channel in which an unbound nucleus of  in the ground state ( )
was one of the fragments was selected among events where  nuclei of momentum  GeV/c per
nucleon undergo coherent dissociation into three alpha particles. The events in question were detected
in a track nuclear photoemulsion containing lead nuclei, which was irradiated at the synchrophasotron of
the Laboratory of High Energies at the Joint Institute for Nuclear Research (JINR, Dubna). The average
transverse momentum of alpha particles produced upon the decay of nuclei was  MeV/c, while
that for “single” alpha ( ) particles was  MeV/c. The average value of the transverse-momentum
transfer in the reaction being considered,  , was  MeV/c. The average value of the cross
section for this channel involving  and  target nuclei was  mb,
while the cross section for the
reaction on the Pb nucleus was  mb. The Coulomb dissociation contribution evaluated on the basis
of the number of events where the momentum did not exceed  GeV/c saturated about  %. In
nine events, the measured total transverse energy of the fragments in the reference frame comoving with the
decaying carbon nucleus did not exceed  MeV, which did not contradict the excitation of the participant
nucleus to the level at  MeV. The average value of the transverse momentum in those events was
 MeV/c.
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