Evidences of the sturdy domination of short-range effect on Coulomb form factors in the atomic nucleus 60Ni

Abstract

     Inelastic Coulomb form factors with inclusion of the effect of short-range correlation functions for certain assignment excitations (such as 2⁺ (1.33), 2^*(2.16), 4^*(2.50), 4^*(3.13), 4^*(3.67), 3^-(4.04), 3^-(6.20), and 3^-(7.05) MeV) as well as for uncertain assignment excitations (such as 4.85 (2⁺, 4⁺), 5.05 (4⁺, 6⁺) and 6.85 (2⁺, 5^-) MeV) in ⁶⁰Ni atomic nucleus have been scrutinized. The form factors of uncertain assignment excitations have been computed by decomposing the excitations 4.85, 5.05 and 6.85 MeV to (C2 and C4), (C4 and C6), and (C2 and C5) components, respectively. The charge density of the ⁶⁰Ni has been also scrutinized using the one- and two-particle parts of cluster extension in collaboration with single-particle harmonic wave functions. The short-range correlation of Jastrow formula, which relies on the correlation parameter (β), has been incorporated into the two-particle part of cluster extension The nucleus of ⁶⁰Ni consists of a ⁵⁶Ni-core plus four energetic neutrons dispersed in f5p-model space, where this nucleus has no energetic protons outer the ⁵⁶Ni-core. Thus, inelastic Coulomb form factors of ⁶⁰Ni have been exclusively computed from the core polarization transition charge density using Tassie formulation, relying on the computed charge density. The oscillator parameter (b) and correlation parameter (β) have been applied to existing calculations, where b and β have been independently created for every specific nucleus through matching between the anticipated and measured elastic form factors. In this study, a single value for each of b and β has been used to compute the inelastic form factors for diverse excitations in ⁶⁰Ni, where the computed results show a well accordance with available data. It is concluded that the influence of short-range correlation functions rules substantially the existing computations, where this effect seems to be crucial to creating an important modification to the predicated findings which ultimately leads to elucidate the data astoundingly across all assumed momentum transfers.