Systematic study of heavy cluster emission from 210–226Ra isotopes

The half lives for various clusters lying in the cold reaction valleys of 210–226Ra isotopes are computed using our Coulomb and proximity potential model (CPPM). The computed half lives of 4He and 14C clusters from 210–226Ra isotopes are in good agreement with experimental data. Half lives are also computed using the universal formula for cluster decay (UNIV) of Poenaru et al., and are found to be in agreement with CPPM values. Our study reveals the role of doubly magic 208Pb daughter in cluster decay process. Geiger–Nuttall plots for all clusters up to 62Fe are studied and are found to be linear with different slopes and intercepts. 12,14C emission from 220Ra; 14C emission from 222,224Ra; 14C and 20O emission from 226Ra are found to be most favourable for measurement and this observation will serve as a guide to the future experiments.