Clustering effects in⁴⁸Cr composite nuclei produced via²⁴Mg +²⁴Mg reaction

Abstract

Abstract. In the framework of studying clustering effects in N=Z light nuclei, an experiment was carried out to get information on the properties of the 48 Cr composite nuclei produced via the 24 Mg + 24 Mg reaction. In particular, the study regards the 48 Cr at 60 MeV of excitation energy where a resonance with a narrow width (170 KeV) has been found by measuring the elastic and anelastic channels. To determine the deformation of this state, evaporative Light Charged Particles (LCP) are measured and compared to the Statistical Model (SM) predictions, which are very sensitive to nuclear deformation. The experiment was performed at LNL using the 8πLP apparatus to select LCPs and a Parallel Plate Avalanche Counter (PPAC) system to detect the Evaporation Residues (ER). Preliminary results on the measurements of ER − LCP and LCP − LCP angular correlations are presented which indicate the presence of a very large deformation.The analysis will proceed with the extraction of the LCP energy spectra and with the angular correlations for high multiplicity channels to determine the deformation.

The New Physics in LILITA_N21: An Improved Description of the Reaction 190 MeV 40Ar + 27Al

“…The moment of inertia for spherical emitters depends on different values of the r 0 parameters considered, and can be modulated to take into account the nuclear elongation by means of deformability parameters. A commonly used ansatz (see for instance [6,[29][30][31]) scales the moment of inertia with the angular momentum in order to consider deformations according to the rotating liquid drop model [32] or for super-and hyper-deformations. In order to consider the widest variability of these parameters in this paper, we used LILITA_N21 [14].…”

“…Large discrepancies between experimental data and simulations for compound nuclei with mass number A = 150 have been evidenced in energy spectra, angular distributions, and multiplicities of neutrons, protons, and α-particles [4][5][6][7][8][9][10]. Although different modifications of the standard SM parameters have been considered, none of them permits simultaneous reproduction of the wide set of experimental observables available.…”

Charged particle decay of hot and rotatingMo88nuclei in fusion-evaporation reactions

“…The study of the de-excitation of compound nuclei dates back to the beginning of the modern nuclear physics, but it has found renewed interest in recent years (for example, [1] for medium mass systems and [2][3][4][5] for very light systems) thanks to the improvement of the experimental techniques, allowing for a cleaner selection of exclusive decay channels. In this way it is possible to put stringent constraints on the ingredients of the statistical model, commonly used to describe the decay of a compound nucleus at excitation energies below 3 MeV/nucleon.…”