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The energy spectra of alpha particles from reactions induced by 280-MeV Ca beams incident to Ta, Au, and U targets were measured at an angle of 0 by means of a high-resolution magnetic analyzer (MAVR setup). The sensitivity of the procedure used made it possible to measure alpha-particle yields that are five to six orders of magnitude less than the maximum yield. The cross section for the formation of alpha particles is shown to be dependent on their binding energy in the target nucleus. The experimental data obtained from these measurements were analyzed on the basis of the model of two- and three-body reaction channels and the model of moving sources. [ABSTRACT FROM AUTHOR]

The energy spectra of alpha particles emitted at an angle of 0 in the interaction of 400-MeV Fe ions with U, Ta, and Be targets were measured by means of a high-resolution magnetic analyzer (MAVR, which is the acronym of the Russian name of this setup). The energy spectra of charged particles ranging from Li to Ne were also measured. The experimental data obtained in this way indicate that the emission of alpha particles is a dominant process in the above reactions. Particles of high energy, up to those in the vicinity of the so-called kinematical limit for two-body reactions, were observed with a rather high yield. The sensitivity of the experimental procedure that employed the aforementioned magnetic analyzer made it possible to observe events characterized by cross-section values smaller by six to eight orders of magnitude than that at the maximum of the spectrum. The cross section for the production of light particles is shown to be dependent on their binding energy in the target. The experimental data obtained in this study were analyzed with aid of the moving-source model. [ABSTRACT FROM AUTHOR]

New semiconductor detectors based on CdZnTe and CeBr3 crystals are tested. A spectrometer facility consisting of CdZnTe, CeBr3, and Si (for α–γ measurements) detectors is assembled for verification tests. The main parameters of the detectors such as energy resolution FWHM/Eγ [keV] and detection efficiency (%) are investigated and measured. The possibilities of measuring photon radiation in a wide energy range are verified. γ–γ and α–γ coincidences are measured using the detectors. The results of the measurements show that the detectors can be used to study nuclear reactions and properties of reaction products. [ABSTRACT FROM AUTHOR]

The differential cross sections for alpha-particle emission at an angle of 0 in the reactions induced by a 6-MeV/nucleon Fe beams incident to U and Ta targets were measured versus the alpha-particle energy by means of a high-resolution magnetic analyzer (MAVR setup). The resulting spectra were found to contain fast alpha particles of energy corresponding to the two- and three-body exit reaction channels, including alpha particles of energy close to the two-body kinematical limit. The data obtained in this experiment were analyzed on the basis of the moving-source model. The emission of nonequilibrium alpha particles in the forward direction from the heavier target nucleus upon the complete or incomplete fusion of nuclei was revealed within the time-dependent quantum approach. [ABSTRACT FROM AUTHOR]

Experiments with 6,8He, 9Li + 28Si, 59Co, and 181Ta reactions in the energy range of 6,8He and 9Li beams 6–36 A MeV have been preformed. Prompt neutrons and gamma radiation were registered by a 12‑detector gamma spectrometer. The values of the total reaction cross sections and the multiplicity distributions for the emission of γ-quanta and neutrons were calculated taking into account the distributions over the number of triggered detectors. [ABSTRACT FROM AUTHOR]

The results of experiments performed at a high-resolution magnetic spectrometer (MAVR) are presented. The differential production cross sections for oxygen isotopes in the Ta reaction at the projectile energy of 10 MeV per nucleon were measured at the MAVR facility. The yield of reaction products is analyzed theoretically in the finite-range distorted-wave Born approximation (FR-DWBA method) by means of the FRESCO code. The theoretical differential cross sections are calculated for sequential neutron transfer. The contributions of the mechanisms of sequential neutron transfer and dineutron-cluster transfer to the production cross sections for the neutron-rich oxygen isotopes O are studied. [ABSTRACT FROM AUTHOR]

The total cross sections for the 6, 8He + 28Si and 9Li + 28Si reactions are measured in the beam energy range of 12–39 A MeV via transmission method with registration of prompt neutron and gamma radiation by a spectrometer with six scintillation detectors. The technique taking into account the experimental values ​​of the efficiency of registering gamma radiation with different multiplicities and the number of triggered spectrometer detectors is used to analyze the experimental data. The experimental data are compared to data obtained earlier in other studies. The values ​​of the total cross section for 8He + 28Si reaction at energy around 20 A MeV are close to those ​​of the total cross section for the 6He + 28Si reaction. The total cross section for the 8He + 28Si reaction is appreciably higher than the total cross section for the 6He + 28Si reaction in the range of 12–16 A MeV. [ABSTRACT FROM AUTHOR]

An Erratum to this paper has been published: https://doi.org/10.1134/S1063778822330018 [ABSTRACT FROM AUTHOR]

In this paper the results of measurements of the total cross sections for the 11Li+28Si reaction in the beam energy range 7A-25A MeV are presented. The experimental cross sections were obtained by registration of the prompt gamma and neutron radiation accompanying the interaction of 11Li nuclei with 28Si nuclei. The total cross sections for the 11Li+28Si reaction are calculated based on a numerical solution of the time-dependent Schrödinger equation for the external weakly bound neutrons of the projectile nucleus 11Li. The calculated total reaction cross sections are in good agreement with the experimental data. [ABSTRACT FROM AUTHOR]