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The elastic scattering angular distribution (AD) for the 15N + 11B system at Elab(15N) = 22.5 MeV has been measured at the DC-60 cyclotron located at INP RK. In addition to our newly measured data, we have reanalyzed the previously measured 15N + 11B cross sections at Elab = 43 MeV using a range of phenomenological and microscopic potentials. The measured AD at 22.5 MeV did not exhibit a significant increase in differential cross sections (DCs) at backward angles (θ > 90°), similar to the previously measured data at Elab = 18.75 MeV and contrary to the measured data at 43 MeV. The measured DC data at backward angles are fairly described using the distorted wave Born approximation (DWBA) method. The α-spectroscopic amplitude (SA) for the 15N → 11B + α configuration was extracted and compared to the available one in the literature. [ABSTRACT FROM AUTHOR]

In our previous work Burtebayev et al, Int J Mod Phys E 28, 1950028 (2019), we presented the angular distribution (AD) for 10 B ions elastically scattered from the 12 C target at E lab ( 10 B) = 41.3 MeV. The measured data exhibited a pronounced increase in cross-sections at backward angles. This is mostly attributed to the effect of deuteron transfer between the colliding nuclei. In this work, we present the inelastic ADs for the same system leading to the J π = 2 + , E x = 4.439 MeV and J π = 3 - , E x = 9.641 MeV excited states of the 12 C nucleus. The measured inelastic 12 C( 10 B, 10 B) 12 C ∗ ADs, together with the previously measured elastic 12 C( 10 B, 10 B) 12 C ADs at E lab ( 10 B) = 17.5, 18, 41.3 and 100 MeV, are analysed within the methods of distorted wave Born approximation (DWBA) and coupled reaction channels (CRC) using the new B3Y and the standard M3Y effective interaction potentials. Spectroscopic amplitude (SA) values were determined for the 12 C → 10 B + d configuration. [ABSTRACT FROM AUTHOR]

The scattering of 10 B particles by 11 B nuclei at the beam energy of 41.3 MeV has been studied. In this case, the angular distributions of the differential cross-sections for transitions to the ground (J π = 3 / 2 -) and excited ( E x = 2.124 MeV, J π = 1/2 - ) states of 11 B nuclei were measured. The measured differential cross-sections of the elastic scattering showed a significant increase at large angles.The data were analyzed using various optical model potentials to test their suitability for describing the scattering, and extracting the spectroscopic amplitude value for the 11 B → 10 B + n configuration.The analysis was extended to include previously measured angular distributions for the 10 B + 11 B system at 10 B beam energies of 24, 36, 40 and 48 MeV. It showed that neutron transfer in the 11 B( 10 B, 11 B) 10 B reaction is the main mechanism of increasing cross sections at backward angles. [ABSTRACT FROM AUTHOR]

Indirect experimental angular distributions data for protons elastically scattered from 14N target nuclei at low energies: 1.8, 2.2, 3.0, 3.3, and 3.8 MeV are extracted from the available experimental excitation functions for p + 14N. These extracted data are subjected to theoretical analysis within the framework of single folding optical potential (SFOP) model in order to obtain the optimal potential that could fairly reproduce the p + 14N elastic scattering angular distributions. The obtained potential parameters are then used to calculate the astrophysical S-factor for 14N(p, γ)15O radiative capture reaction at very low energies where no experimental data is available and compared with the available experimental data. [ABSTRACT FROM AUTHOR]

Elastic and inelastic scattering angular distributions (ADs) for the 6Li + 144Sm system in the 21–45 MeV energy range are analyzed with a Woods-Saxon phenomenological and two microscopic optical potentials, with one derived from the São Paulo formulation and the other from cluster folding of realistic alpha and deuteron potentials. Energy-dependent real, JV, and imaginary, JW, potential volume integrals are extracted from each potential system. It is shown that their variation in the region of the Coulomb barrier displays the normal threshold anomaly of strong coupling between the real and imaginary potentials. The reduced energy dependence on the extracted reduced reaction cross sections for the 6Li + 144Sm system is presented and compared to the calculated one using Wong’s formula. The strength and energy dependence of the inelastic ADs are reasonably described using the adopted potentials within the framework of the coupled channels method. [ABSTRACT FROM AUTHOR]

A set of experimental data consisting of angular distributions of d+ 11 B elastic and inelastic scattering and (d,t) reaction obtained at deuteron energy of 14.5 MeV as well as data sets for (d,p) (E d = 21.5 MeV), (d,n) (E d = 15.4 MeV) and (d, 3 He) (E d = 11.8 MeV) nucleon transfer reactions were analysed using the continuum-discretized coupled-channel (CDCC) and coupled-reaction channel (CRC) methods. It was found that at forward scattering angles the elastic scattering data are well described by parameter-free CDCC calculations which include breakup of the deuteron, but at more backward angles virtual effects due to target excitation and neutron-transfer reactions play an important role. The strongest effects are due to the excitation of 11 B and the neutron pickup reaction, reflecting their large cross sections. The effects induced by proton-transfer reactions are found to be negligible. [ABSTRACT FROM AUTHOR]

Experimental 7 Li + 27 Al elastic scattering angular distributions in the 6–89 MeV laboratory energy range have been re-analysed using different phenomenological and microscopic potentials to investigate the cluster nature of the weakly-bound 7 Li projectile and the associated break-up effect on the elastic scattering data. The consistency of the results obtained within the various implemented potentials was also analysed. A new microscopic dynamical polarisation potential was applied to simulate the significant coupling effect to the break-up channel, which is responsible for the observed reduction in the strength of the implemented real potentials. A reasonable agreement between the considered experimental results and the present theoretical calculations was obtained. The study confirms the absence of the usual threshold anomaly present in nuclear systems involving tightly-bound projectiles. [ABSTRACT FROM AUTHOR]

New experimental measurements for 16O + 12C elastic scattering angular distribution at Elab = 27 MeV were performed at the cyclotron DC-60 INP RK. The measured data as well as the previous measurements for 16O + 12C angular distributions in the energy range Elab = 20–140 MeV are subjected to detailed analysis using the double folding optical potential. For this purpose, different models of interaction potentials are used, such as the BDM3Y1-Reid and the CDM3Y1-Paris based on the M3Y interactions. The new B3Y-Fetal potentials are also tested, and the efficiency of the DDB3Y1-Fetal interaction to increase the saturation properties of cold nuclear matter was studied in comparison with the well-known BDM3Y1-Reid and CDM3Y1-Paris interactions. [ABSTRACT FROM AUTHOR]

In this study, the available 6Li + 58Ni angular distributions in the energy range 9.9–600 MeV are reanalyzed theoretically within the framework of various interaction potentials based on both phenomenological and microscopic approaches. The well-known cluster structure of 6Li as a core of α-particle and a deuteron revolving around this core was observed and considered for generating the 6Li + 58Ni cluster folding potential. At all energies, the analyses performed within the framework of the considered potentials gave reasonable fits of data. The performed cluster folding analysis showed the necessity to reduce the potential’s strength by ~ 50–53% for describing the data fairly. The observed reduction in the strength of microscopic potential is mainly due to the dissociation of 6Li in the field of the target nucleus and consequently the high 6Li clusterization probability. The data has been also successfully reanalyzed using unrenormalized real São Paulo potential. [ABSTRACT FROM AUTHOR]

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 α -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 → 9 Be + α configuration at various energies. The results are compared with previously reported values. [ABSTRACT FROM AUTHOR]

The experimental angular distributions for 20Ne + 16O elastic transfer are reanalyzed using different forms of both phenomenological and semi-microscopic potentials. The significant increase in the cross-sections at the backward hemisphere, due to the contribution of α-cluster transfer, is investigated using the distorted wave Born approximation (DWBA) method. The spectroscopic amplitude (SA) for the configuration 20Ne → 16O + α at the different concerned energies is extracted. The agreement between the experimental data and theoretical calculations using the two approaches is reasonably good. [ABSTRACT FROM AUTHOR]

In the context of the double folding optical model, the elastic and inelastic scattering of 9Be + 120Sn at Elab (9Be) = 31, 42 and 50 MeV and 9,10,11Be + 64Zn elastic scattering at Ec.m. = 24.5 MeV are investigated. Real folded potentials are generated using the DDM3Y interaction based on the suggested density distributions for the 9,10,11Be nuclei. The imaginary potential is taken in the traditional standard Woods–Saxon form. Coupled channel (CC) calculations using a rotational model are performed for 9Be inelastically scattered from 120Sn, leading to different 120Sn excited states. Successful reproduction of the observed angular distributions of the elastic and inelastic scattering differential cross-sections has been achieved using the derived potentials. Special attention is paid to the previously suggested ( 3 1 − , Ex = 2.40 MeV) 120Sn excited state in order to present the contributions come from - 3 1 − at 2.40030(5) MeV, 2 3 + at 2.42090(3) MeV, 2 2 + at 2.355383(24) MeV, and 4 1 + at 2.465632(23) MeV—in forming the inelastic data observed at Ex = 2.41 MeV. [ABSTRACT FROM AUTHOR]

Angular distributions of the elastic scattering differential cross section data for the 16O + 16O nuclear system in the energy range of 75–480 MeV have been analyzed using the double-folding optical potential model. The real part of the interaction potential is derived on the basis of double folding of different models of interaction such as CDM3Y1, CDM3Y6, DDM3Y1, and BDM3Y1. The imaginary part of the potential is taken as the sum of the imaginary volume term expressed in the phenomenological Woods–Saxon squared form and a derivative Woods–Saxon surface term. Renormalization factors Nr for the various concerned interaction models are evaluated. The potential created by the BDM3Y1 model of interaction has the shallowest depth, which reflects the necessity of using higher renormalization factor. The obtained real volume integral and total reaction cross sections are calculated at different energies using the derived potentials. The obtained results are in agreement with the experimental data. [ABSTRACT FROM AUTHOR]

The previously measured angular distributions for 3He elastically and inelastically scattered from 20Ne target at energies 33.4 and 68 MeV are reanalyzed using the microscopic coupled reaction channels (CRC) method, by taking into account simultaneously the 0+ (0.0 MeV), 2+ (1.63 MeV) and 4+ (4.25 MeV) rotational states of 20Ne. A new 3He + 20Ne interaction potential is constructed on the basis of cluster folding model and α + 16O cluster structure of 20Ne nucleus. The agreement between the experimental data and theoretical calculations is fairly good. The obtained β2 and β4 values are in a good agreement with previously reported values. [ABSTRACT FROM AUTHOR]

Available experimental data for protons elastically scattered from 14N and 16O target nuclei are reanalyzed within the framework of single folding optical potential (SFOP) model. In this model, the real part of the potential is derived on the basis of single folding potential. The renormalization factor Nr is extracted for the two aforementioned nuclear systems. Theoretical calculations fairly reproduce the experimental data in the whole angular range. Energy dependence of real and imaginary volume integrals as well as reaction cross sections are discussed. [ABSTRACT FROM AUTHOR]

The elastic scattering angular distributions for O + C nuclear system have been analyzed using double folding potential of different interaction models: CDM3Y1, CDM3Y6, DDM3Y1 and BDM3Y1. We have extracted the renormalization factor N for the different concerned interaction models. Potential created by BDM3Y1 model of interaction has the shallowest depth which reflects the necessity to use higher renormalization factor. The experimental angular distributions for O + C nuclear system in the energy range 115.9-230 MeV exhibited unmistakable refractive features and rainbow phenomenon. [ABSTRACT FROM AUTHOR]

The main aim of this work was to study the elastic O + C scattering reaction over a wide range of energies and to analyze the effect of the elastic and inelastic α cluster transfer channels on the cross section for elastic scattering into the rear hemisphere. It is shown that allowing for the coupling of the entrance channels improves the theoretical description of the cross section in the region of wide angles. [ABSTRACT FROM AUTHOR]

The main aim of this work was to describe the reactions of elastic scattering of O + C over a wide range of energies in an optical model with an l-dependent core. We obtained a value for the compressibility coefficient that agreed with the one found from data on the giant monopole resonance. We considered the elastic transfer of an α particle to reproduce the cross section in the reverse hemisphere. [ABSTRACT FROM AUTHOR]