Abstract

Using the available data of half-life time of unstable nuclei given that the number of protons is greater than the number of neutrons, an elaboration was made on the dependence of half-life time of these nuclei on the value of the difference between the two numbers, which is referred to as the isospin asymmetry effect. The available data of half-life time was analyzed and two formulas of half-life time were suggested. The analysis of the data and the suggested formulas indicated that the half-life time of these nuclei and their decay mode are strongly dependent on the isospin asymmetry.

Key words: Half-life time formula, isospin asymmetry, nuclei with.