Vol. 7, Issue 1, Part B (2025)

In our recent publications pertaining to 4G model of final unification and based on strong and electroweak interactions, we have developed a completely new formula for estimating nuclear binding energy. With reference to currently believed Semi Empirical Mass Formula (SEMF), we call our formula as ‘Strong and Electroweak Mass Formula’ (SEWMF). Our formula constitutes 4 simple terms and only one energy coefficient of magnitude 10.1 MeV. First term is a volume term, second term seems to be a representation of free nucleons associated with electroweak interaction, third term is a radial term and fourth one is an asymmetry term about the mean stable mass number. Considering this kind of approach, nuclear structure can be understood in terms of strong and weak interactions and cold nuclear fusion like complicated concepts can be understood in a theoretical approach positively. In this paper, by considering the volume, surface area and radius concepts applicable to protons and neutrons independently, we have developed another simple formula for estimating the number of free nucleons. Considering isospin concept, we have modified the asymmetry term. Considering a marginal error, it seems workable for Z=6 to 124 and needs minor modification for better accuracy. Mass number extrapolation point of view, we consider lower and upper mass numbers as, 2Z-4 and 3.5Z respectively. It needs further study.