Improving of phenomenological formula for nuclear energy decay (Q_α-value) of heavy and super heavy nuclei

摘要

The phenomenological formula of Q_(α)-value (α-decay energies) for heavy and super heavy nuclei was presented using modification of a Liquid Drop Model (LDM) which is composed of effects of volume energy, Coulomb energy, symmetry energy and binding energy of α-particle. It can be employed to validate the experimental observation and calculation to a large extent of heaviest nuclei with high accuracy for root mean square deviation (0.54) and standard deviation (0.38) are which useful for future experiments. In comparison of computed Q_(α)-value with experimental data an excellent agreement has been obtained. These results indicate the acceptability of the approach. Furthermore the theoretical quantity (S) has been proposed in order to predict the Q_(α)-value of α-particles. This is done by partial differentiation of both sides of Q_(α)-value with respect to the mass number (A), this quantity describes the Q_(α)-value dependence of (A), and these results show agreement between S and Q_(α)-values behaviours. The separation energy difference (Sp-Sn) increases with increasing mass number (A), on the whole.