Материал портала ядерных знаний BelNET
статья/документ по запросу ресурса "4498"
DOI 10.1140/epja/i2004-10051-7 10 P. Eur. Phys. J. A 22, 471-480 (2004) Ключевые слова: ternary fission, nuclear track emulsion, uranium, thermal neutrons, unstable nucleus We have studied the properties of the relativistic helium fragments emitted from the projectile in
the interactions of  ions accelerated at an energy of  GeV with emulsion
nuclei. The total, partial
nuclear cross-sections and production rates of helium fragmentation channels in relativistic nucleus-nucleus
collisions and their dependence on the mass and energy of the incident projectile nucleus are investigated.
The yields of multiple helium projectile fragments disrupted from the interactions of projectile
nuclei with hydrogen  , light  and heavy 
groups of target emulsion nuclei are discussed and
they indicate that the breakup mechanism of the projectile seems to be independent of the target mass.
Limiting fragmentation behavior of fast-moving helium fragments is observed in both the projectile and
target nuclei. The multiplicity distributions of helium projectile fragments emitted in the interactions of
projectile nuclei with the different target nuclei of the emulsion are well described by the KNO
scaling presentation. The mean multiplicities of the different charged secondary particles, normally defined
shower, grey and black ( ,  and  ) emitted in
the interactions of GeV
with the
different groups of emulsion nuclei at different ranges of projectile fragments are decreasing when the
number of  fragments stripped from projectile increases. These values of 
( and  particles)
in the events where the emission of fast helium fragments were accompanied by heavy fragments having
 seem to be constant as the multiplicity increases, and exhibit a behavior
independent of the multiplicity.Загрузить:
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