The elastic scattering angular distributions of the weakly bound
Be projectile by
Al,
Zn,
Y,
Sn, and
Pb target nuclei at various incident energies are analyzed within the framework of optical ...model-based double-folding model. The aim is to examine the sensitivity of the elastic scattering cross sections to different density distributions of the projectile nucleus. For this purpose, the real part of the optical potantial was obtained for five different projectile density distributions, namely Moszkowski, Gupta 1, Gupta 2, Schechter, and Ngô–Ngô density distributions. The imaginary part is taken as the Woods-Saxon potential. The theoretical results are in good agreement with the experimental data.
The elastic scattering angular distributions of the weakly bound Formula omittedBe projectile by Formula omittedAl, Formula omittedZn, Formula omittedY, Formula omittedSn, and Formula omittedPb ...target nuclei at various incident energies are analyzed within the framework of optical model-based double-folding model. The aim is to examine the sensitivity of the elastic scattering cross sections to different density distributions of the projectile nucleus. For this purpose, the real part of the optical potantial was obtained for five different projectile density distributions, namely Moszkowski, Gupta 1, Gupta 2, Schechter, and Ngô-Ngô density distributions. The imaginary part is taken as the Woods-Saxon potential. The theoretical results are in good agreement with the experimental data.
Abstract
Extensive experimental investigations into understanding the fine structure of giant resonances in nuclei across the periodic table have been carried out in recent years using the ...state-of-the-art K600 magnetic spectrometer of iThemba LABS, Cape Town, South Africa. Based on the established results in comparison to various theoretical calculations, it has been found that the fine structure observed in different giant resonances, namely Isoscalar Giant Quadrupole Resonance (ISGQR), Isovector Giant Dipole Resonance (IVGDR) and Isoscalar Giant Monopole Resonance (ISGMR), in light nuclei such as
40
Ca,
28
Si and
27
Al is dominated by Landau damping although signatures for the role of the spreading width are also found. In this report, characteristic energy scales extracted in light nuclei are compared with the state-of-the-art theoretical calculations, while the fine structures results obtained are compared using semblance analysis to search for possible signatures of common fragmentation patterns induced by Landau damping and coupling to 2p-2h states obtained from different giant resonances.
Experiments investigating the fine structure of the IsoScalar Giant Monopole Resonance (ISGMR) of 48Ca were carried out with a 200 MeV alpha inelastic-scattering reaction, using the high ...energy-resolution capability and the zero-degree setup at the K600 magnetic spectrometer of iThemba LABS, Cape Town, South Africa. Considerable fine structure is observed in the energy region of the ISGMR. Characteristic energy scales are extracted from the experimental data by means of a wavelet analysis and compared with the state-of-the-art theoretical calculations within a Skyrme-RPA (random phase approximation) approach using the finite-rank separable approximation with the inclusion of phonon-phonon coupling (PPC). Good agreement was observed between the experimental data and the theoretical predictions.
The elastic scattering data of
10
B+
120
Sn at 31.5, 33.5, 35, 37.5, and 39.7 MeV incident energies are reanalyzed using the São Paulo Potential version 2 (SPP2) and the Brazilian Nuclear Potential ...(BNP) in the framework of optical-model-based double folding (DF) model. The optical potential and the elastic scattering cross sections are obtained using two forms of matter densities for
10
B: the experimental density which is twice the charge density (CD) and theoretical density calculated through the Dirac-Hartree-Bogoliubov (DHB) model. The real part of the optical potential is considered in a microscopic form, while the imaginary part in both microscopic and phenomenological forms. The sensitivity of the elastic scattering cross sections to the two potentials and the two forms of projectile densities is examined. The SPP2 with CD density for the projectile performs better than the BNP as it requires renormalization factors of
N
R
= 1.0 and
N
I
∼
0.7 - 1 for the real and imaginary potentials, respectively. This is also better than previous calculations using the first version of SPP which requires
N
I
= 0.25 - 0.35 to describe the
10
B+
120
Sn elastic scattering data. In general, the theoretical calculations show good agreement with the experimental data.
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