Mechanism of the

The differential cross sections of triton from the 11B($\alpha$,t) reaction with transitions to the ground (0+) and excited states of the 12C nucleus at $E_{x} = 4.44$ MeV (2+), 7.65 MeV (0+), 9.64 MeV (3-) and 14.08 MeV (4+) have been measured at an $\alpha$-particles energy of 40 MeV. Analysis of the measured angular distributions was carried out in the framework of the coupled reaction channels method considering the contribution of the 8Be cluster exchange mechanism. It is shown that the direct mechanism with proton transfer dominates at an energy of 40 MeV, and the heavy particle transfer is noticeable only at large angles. An exception is the transition to the 14.08 MeV (4+) state, which is possible only by the transfer of the 8Be cluster. It is established that the couplings between the excited states of 12C, arising from the nonsphericity of the nucleus, have little effect on the $(\alpha, t)$ reaction cross sections in the forward hemisphere, but strongly affect the cross sections at large angles

Continuous spectra of light charged particles from interaction of 30 MeV energy protons with cooper

This paper presents the experimental double-differential and integral cross sections of reactions (p,xp), and (p,xα) on natCu nucleus. The experiment with the protons, accelerated to energy of 30.0 MeV was performed at the isochronous cyclotron of Institute of Nuclear Physics (Kazakhstan). We investigated the adequacy of the theoretical models in explaining the measured experimental data and contributions of direct, preequilibrium and compound processes in the formation of the cross sections were determined. We assert that the traditional frameworks are valid for the description of the experimental data

Phosphate Glass Detectors for Heavy Ion Identification

The problem of the boundaries of the Mendeleev table of chemical elements is closely related to the understanding of the properties of nuclear matter. In this regard, the synthesis of superheavy nuclei on accelerators and the registration of their decay products are of fundamental scientific interest. The Joint Institute of Nuclear Research in Dubna (JINR) conducts research on the synthesis of superheavy nuclei on the new DC-280 cyclotron (the Factory of Superheavy Elements). As part of the development of this experiment, the possibility of using phosphate glass as a material for detectors of heavy and superheavy nuclei is being considered. This issue requires test experiments to study the recording properties of the glass at different irradiation and treatment conditions. The article presents a method for identifying heavy ions in phosphate glass detectors under various conditions by the geometric characteristics of ion tracks. The results obtained indicate the possibility of using the KNFS-3 phosphate glass detectors for registration and identification of accelerated superheavy nuclei

A new proton spectra for

In this paper, we present a new measurement of the inclusive cross section (p,xp) reactions on $$^{nat}\hbox {Cu}$$ at incident energies of $$\hbox {E}_{p}=$$ 7 and 30 MeV. The (p,xp) reaction at $$\hbox {E}_{p}$$= 7 MeV on $$^{nat}\hbox {Cu}$$ is measured for the first time and (p,xp) and ($$\hbox {p,x}\alpha$$) inclusive cross section for the same target at $$\hbox {E}_{p}=$$ 30 MeV is re-measured in order to improve the quality of the previous experimental data. For both energies, the mechanism of the pre-equilibrium reactions as well as the level of energy dependence are discussed and the adequacy of the theoretical models in explaining the newly measured experimental data is also assessed by comparing the experimental data with the results of the Hauser-Feshbach and Exciton models. We use the microscopic approach based on nucleon–nucleon interaction to produce the complex nuclear potential

New measurements and analysis of elastic scattering of

The angular distributions of $$^{13}$$C elastically scattered by $$^{9}$$Be nuclei were measured at $$E_{Lab}$$ ($$^{13}$$C) = 16.25 and 19.5 MeV. The measured angular distributions were analyzed via the optical model and the DWBA within the coupled reaction channels methods. In addition to this, the previously obtained data were reanalyzed at energies $$E_{Lab}$$ = 22.75, 28.12, 36.15, 57.77 and 72.88 MeV. The aim of the study was to elucidate the role of the $$\alpha$$-cluster transfer mechanism in the large-angle scattering. As a result of these calculations, the optimal parameters of the potentials and their energy dependence were obtained for $$^{13}$$C+$$^{9}$$Be nuclear system. The data at the backward angles are fairly well reproduced. The spectroscopic amplitudes were extracted for the $$^{13}$$C $$\rightarrow$$$$^{9}$$Be + $$\alpha$$ configuration at various energies. The results are compared with previously reported values

Asymptotic normalization coefficient for

This work is aimed at clarifying the contribution of the proton direct radiative capture to the $${}^{12}\mathrm{C}(p,\gamma ){}^{13}\mathrm{N}$$ reaction by specifying the value of the asymptotic normalization coefficient (ANC) for $${}^{12}\mathrm{C}+p\rightarrow {}^{13}\mathrm{N}_\mathrm{g.s.}$$. In order to do this, the differential cross section of the proton transfer in the $${}^{12}\mathrm{C}({}^{10}\mathrm{B},{}^9\mathrm{Be})^{13}\mathrm{N}$$ reaction at an energy of 41.3 MeV has been measured and analyzed through the modified distorted wave Born approximation (MDWBA) method taking into account the reaction channel coupling and $${}^{3}{\mathrm{He}}$$ cluster transfer contributions. The value of the ANC was derived to be 1.63±0.13 fm$$^{-1/2}$$, which was used in estimating the astrophysical S(E) factor and the reaction rate of the proton radiative capture by the $${}^{12}{\mathrm{C}}$$ nucleus at energies of astrophysical relevance