CHECKOUT of PREDICTIONS of the PARTON MECHANISM

FRAGMENTATION of NUCLEI In EMULSION EXPERIMENTS

ON JINR NUCLOTRON

Proposition of group of nuclear - nuclear interaction group of HEP PNPI,

April, 2001

1. Now it is possible to state, that the blanket legitimacies of process fragmentation of relativistic nuclei are known for us. The essence of this process consists in voiding virtual, without mass, particles (partons) existing in a nucleus up to its interaction with other nucleus. The partons do not apparent, but after they in process hadronisation gain mass, they become actual fragments, which are filed in experiment. Essential that circumstance is, that the fragments apparent in experiment, maintain quantities and directions of momentts of partons, preceding to them. The appearance by limiting fragmentation takes place. Thus, the appearance fragmentation of relativistic nuclei does not differ from process fragmentation of hadrons or quarks the first representations about which are formulated by the Feynman, Gribov and Yang.

2. All this allows to state, that today appearance fragmentation of relativistic nuclei from object of examination becomes by the tool of examination of structure of nucleus ever more. The especially valuable information can be obtained at fragmentation of light relativistic nuclei. So, for example, us was shown, as in a kern of lithium - 6 there are two spatially parted fields in which the two-charging fragments are shaped. Our calculations based on representation that the relativistic nucleus is dynamic system, discover an essential role of fragmentation channels of nuclei of carbon and oxygen going through an intermediate state Be-8. In these calculations there are no free parameters. If it so, the special interest represents experimental examination fragmentation of nuclei Be-9 and B-9. It is easy to count outputs of fragments from these nuclei, and the experimental checkout of these calculations can appear the important proof of heuristic value of the parton mechanism fragmentation of relativistic nuclei. However, both the discrepancy of calculation and experiment will be not less interesting.

3. The existence of a metastable state of two alphas of particles as Be-8 is of interest and in connection with a nucleosynthesis. In hydrogen stars, and in intermixtures of isotopes of hydrogen at mu - meson catalysis, the formation of heavier nuclei is hindered not by stability of isotopes with €=5. In helium stars the process of synthesis of carbon - 12 becomes possible due to presence of an intermediate state Be-8. Our calculations fragmentation of nuclei of carbon - 12 are in the complete consent with experiment on study fragmentation of carbon in propane chamber of JINR, where was shown, that the share of events with two and three alphas by particles is equal approximately 60 %. In this calculation a share of the channel containing Be-8 about 20 %. But then should with major section go and reverse reaction of synthesis of carbon - 12 through Be-8. Till now such response in laboratory requirements was not observed. It is possible, that the fusion reaction of carbon - 12 will manage to be realized at use high-current linear accelerater an alpha of particles and condensed helium of a target.

4. This direction of examination can be maintained and at use of other light nuclei of nuclotron JINR.

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