Empirical formula for the most stable isobar against beta decay

Many of the nuclei produced in the lab are radioactive. The degree of instability grows as the distance of a given nuclide increases from the stable nuclide with the same mass number. An unstable nuclide attains stability through different decay mechanisms such as alpha decay, beta decay, gamma decay, cluster radioactivity etc. In the present work we have developed a formula for finding the most stable isobar for a given mass number against beta decay. We have also studied the mass parabola for different isobars with mass number ranging from 200-223. It was found that the lowest point in the parabola, which is the Z value of most stable isobar against β decay, matches well with our formula predictions