UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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Conference: Bucharest University Faculty of Physics 2004 Meeting


Section: Nuclear and Elementary Particles Physics


Title:
INVESTIGATION OF LIGHT NUCLEUS CLUSTERING IN RELATIVISTIC MULTIFRAGMENTATION PROCESSES


Authors:
The BECQUEREL Collaboration M.I.Adamovich[1], M.M.Chernyavsky[1], V.A.Dronov[1], S.G.Gerasimov[1], S.P.Kharlamov[1], K.A.Kotelnikov[1], V.G.Larionova[1], G.I.Orlova[1], N.G.Peresadko[1], N.G.Polukhina[1], N.A.Salmanova[1], V.Bradnova[2], A.D.Kovalenko[2], V.A.Krasnov[2], A.I.Malakhov[2], P.A.Rukoyatkin[2], V.V. Rusakova[2], S.Vokal[2,6], P.I.Zarubin[2], L.Just[3], M.Haiduc[4], E.Stan[4], E.Stefan[4], F.G.Lepekhin[5], B.B.Simonov [5].


Affiliation:
[1] Lebedev Physical Institute of the RAS (FIAN), Moscow

[2] Join Institute for Nuclear Research, Dubna

[3] Institute of Experimental Physics of the SAS, Kosice, Slovakia

[4] Institute of Space Sciences, Bucharest-Magurele, Romania

[5] St. Petersburg Institute of Nuclear Physics, Gatchina, Russia

[6] Safarik University, Kosice, Slovakia


E-mail


Keywords:
BECQUEREL Project


Abstract:
The program of irradiation of emulsions in Nuclotrons beams named BECQUEREL Project is destined to continue irradiation in newly produced beams with the purpose of studying in detail processes of fragmentation of light radioactive nuclei, as well as obtaining basic information about the charge states of secondary particles in irradiating by moderate and heavy nuclei. The advantages taken from the use of Nuclotrons beams consist in that a limiting fragmentation is set in, the reaction takes shortest time, fragmentation products are collimated in a narrow angle cone, and ionization losses of the reaction products are minimum. The expected results would make it possible to answer some topical questions concerning the cluster structure of light radioactive nuclei and to clarify the role of the collective effects in a dense matter of colliding nuclei. Thanks to the best spatial resolution, the nuclear emulsions offer the possibibility to obtain unique results along these lines. Irradiations are performed in the secondary beams of He, Be, B, C and N radioactive nuclei formed on the basis of Nuclotrons primary beams of stable nuclei. The results on the coherent dissociation of Li, C, O, Mg, and S nuclei obtained by this method are now of special interest since they open new possibilities in understanding the topical problems of the structure of nuclei. The emulsions are especially helpful in the study with neutron deficit nuclei. It is especially interesting to search for proofs that there exists a proton halo for radioactive nuclei. The study of the nuclear structure is certain to have a deep relation to the nuclear aspects of astrophysical phenomena. The structure of nuclei can turn out to be another key to undestanding the processes of synhesis of elements in stars, in Sun and primordial processes of nuclear synthesis when Universe was created.