Fusion systematics in the barrier region using the neutron flow model

Abstract

According to Stelson's neutron flow model the threshold barrier is correlated to the onset of neutron flow. A systematic study of a large set of systems indicates that there exists a very good correlation between the threshold barrier and the intersurface distance after including the zero point motion of collective surface vibrations of the colliding nuclei in the prescription of Stelson. ͓S0556-2813͑96͒02908-1͔PACS number͑s͒: 25.70.Jj, 24.10.Nz

Entrance Channel Mass Asymmetry Effects in Sub-Barrier Fusion Dynamics by Using Energy Dependent Woods–Saxon Potential

“…In this sense, the fusion dynamics of 48 22 Ti + 58,60,64 28 Ni reactions attracts researchers to explore their fusion dynamics. [12] Due to increase of isotopic mass of target nuclei, a strong sub-barrier fusion enhancement is expected for heavier target isotope but authors claim a mild isotopic dependence of sub-barrier fusion enhancement of 48 22 Ti+ 58,60,64 28 Ni reactions rather than strong isotopic sub-barrier fusion enhancement. [12] To clarify these facts, the present article explores the fusion dynamics of 48 22 Ti + 58,60,64 28 Ni reactions within the view of the EDWSP model and the coupled channel formulation.…”

“…[12] Due to increase of isotopic mass of target nuclei, a strong sub-barrier fusion enhancement is expected for heavier target isotope but authors claim a mild isotopic dependence of sub-barrier fusion enhancement of 48 22 Ti+ 58,60,64 28 Ni reactions rather than strong isotopic sub-barrier fusion enhancement. [12] To clarify these facts, the present article explores the fusion dynamics of 48 22 Ti + 58,60,64 28 Ni reactions within the view of the EDWSP model and the coupled channel formulation. In case of these reactions, the collective excitations of fusing nuclei play a crucial role in the sub-barrier fusion dynamics and hence the inclusion of such dominant channel results in the substantially large sub-barrier fusion enhancement over the predictions of one-dimensional barrier penetration model.…”

Role of projectile breakup effects and intrinsic degrees of freedom on fusion dynamics

“…It has been recognized that the fusion mechanism of tightly bound nuclei in the close vicinity of the Coulomb barrier is strongly influenced by the intrinsic structure degrees of freedom of the colliding pairs [1][2][3][4][5][6][7]. For stable nuclei, the coupling of the relative motion of the colliding nuclei to their nuclear structure degrees of freedom, like collective surface vibrational states (spherical nuclei), rotational states (deformed nuclei), nucleon (multi-nucleon) transfer channels etc., eliminates the discrepancies between experimental fusion data and the expectations of the one-dimensional barrier penetration model [8][9][10][11][12][13]. However, in the fusion of colliding systems involving weakly bound nuclei (or halo nuclei), the breakup channel sig-nificantly affects the fusion process in the close vicinity of the Coulomb barrier [14,15].…”

Study of Fusion Dynamics Using Skyrme Energy Density Formalism with Different Surface Corrections

“…The experimental data are taken from Refs. [1,[14][15][16][17][18][19][20][21][22][23][24]. We see that different values of 𝜆 can explain barrier heights within ±10% of the experimental values.…”

“…energy, 𝐸 c.m. , for the reactions of 24 Mg + 24 Mg, [15,16] 28 Si + 28 Si, [16−18] 48 Ca + 48 Ca, [19,24] 64 Ni + 64 Ni, [21] 40 Ca + 50 Ti, [23] and 48 Ti + 58 Ni. [22] We see that no particular value of 𝜆 explains the fusion cross sections.…”