B. S. Yuldashev

Formation of the mirror nuclei 3H and 3He in 16Op collisions at a momentum of 3.25 GeV/c per nucleon

A comparative analysis of the inclusive production of 3H and 3He nuclei in 16Op interactions at a momentum of 3.25 GeV/c per nucleon is performed, and it is shown that the formation of these mirror nuclei occurs under close physical conditions, the distinction between their binding energies having no significant effect on the formation of the nuclei.

Cross sections for the production of stable and unstable isotopes with charge numbers from one to eight in 16Op collisions at 3.25 A GeV/c

New experimental data are presented for the inclusive cross sections both for the production and for the yield of stable and unstable isotopes with charge numbers from one to eight in 16Op collisions at 3.25 A GeV/c.

Inclusive deuteron production in 16Op collisions at a momentum of 3.25 GeV/c per nucleon

Experimental data on inclusive deuteron production in 16Op collisions at high energies were obtained for the first time under conditions of 4π geometry. An irregularity in the momentum spectrum of deuterons in the rest frame of oxygen nuclei is found in the range 0.40 ≤ p ≤ 0.55 GeV/c, and the reasons for its appearance are discussed. The mean multiplicities of secondary fragments are correlated with the presence of deuterons in an event, these correlations being positive for fragments of charge in the range zf ≤ 4 and negative for fragments of charge in the range 5 ≤ zf ≤ 7. This is likely to be due to baryon-charge conservation.

Phenomenological analysis of the channels of the production of three and four alpha particles in 16Op collisions at 3.25 GeV/c per nucleon

A phenomenological analysis of the channels of the production of three and four alpha particles in 16Op collisions at 3.25 GeV/c per nucleon is performed for the first time under conditions of 4π geometry. The experimentally observed azimuthal asymmetries and collinearity are described on the basis of a phenomenological model that assumes that the excitation of the nucleus involved is peripheral and that its decay is statistical. It is shown that the azimuthal asymmetries in question are due to the transverse motion of the fragmenting nucleus. The mean transverse momentum of alpha particles and the collinearity of their emission in the reaction plane are found to be independent of the transverse-momentum transfer to the nucleus involved.

Contribution of excited nuclei 12C* to the channel of three-alpha-particle production in 16Op collisions at a momentum of 3.25 GeV/C per nucleon

A phenomenological analysis of the channel involving the production of three alpha particles in collisions of relativistic oxygen nuclei with protons is performed for the first time. It is shown that one-third of it is saturated by the decay of an excited nucleus 12C*, while the remaining part is due to direct Fermi breakup or the quasielastic knockout of one alpha-particle cluster from a loosely bound residual nucleus consisting of three alpha particles. The results obtained by simulating the decay of the excited system involving three alpha particles for an isotropic phase space describe experimental data satisfactorily at moderate values of the excitation energy (ΔE*<15 MeV).

Proton production in 16Op collisions at 3.25 GeV/c per nucleon

The momentum features of protons originating as fragments from 16Op interactions at 3.25 GeV/c per nucleon are analyzed for the first time under conditions of 4π geometry. It is found that the mechanisms of the production of all protons traveling in the forward direction in the rest frame of the fragmenting nucleus (with the exception of evaporated protons) do not depend on either the primary energy or the target-nucleus type, this regularity being quite universal for the formation of such protons. It is shown that there is a strong correlation between the shape of the momentum spectrum of protons appearing as fragments from such interactions, especially slow protons, and the degree of the excitation of the fragmenting nucleus.

Coherent dissociation {sup 12}C{r_arrow}3{alpha} in lead-enriched emulsion at 4.5 GeV/c per nucleon

The transverse-momentum distributions and correlation characteristics of relativistic

Production of cumulative protons in high-energy hadron-nucleus and nucleus-nucleus interactions

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Some special features of the momentum spectrum of protons produced in 16Op collisions at a momentum of 3.25 GeV/c per nucleon

particles from the coherent dissociation of a carbon nucleus into three

Production of

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