Exotic decay in proton-rich Nd isotopes

Abstract

Exotic decay of various Nd isotopes emitting4He, 8Be, 12 C, 20Ne, 24Mg, 28Si and 32S was studied taking the potential barrier as the sum of Coulomb and proximity potentials. The predicted half-lives are well within the present upper limit for measurements (T1/2< 1030 s). It is found that 16O and 20Ne emissions from 120Nd are the most favourable for measurements with T1/2 ≈ 1010 s. The predicted lowest half-life time for 20Ne emission from 120Nd, stresses the role of the doubly magic 100Sn daughter in the exotic decay process. The nuclear structure effect and shell effect are evident from the Geiger–Nuttall plots for different clusters. It is found that the presence of neutron excess in the parent nuclei slows down the exotic decay process.

Cluster formation probability in the trans-tin and trans-lead nuclei

“…It is clear form the plot that the highest peaks are found at 28,30 Mg, the experimentally observed cluster radioactivity. In the case of 232-235 U, 236 Pu the maximum preformation probability is obtained for 28 [64]) but the highest peaks in cluster formation probability is obtained for 30 Mg as compared to 28 Mg cluster. i.e.…”

34Si accompanied ternary fission of 242Cm in equatorial and collinear configuration

“…Here we would like to mention that 242 Cm is an alpha emitter 34 and 34 Si cluster has been found to be emitted from the isotope. 35 Extensive theoretical studies on the areas of alpha decay, 36-39 cluster decay [40][41][42][43] and spontaneous fission of heavy and superheavy nuclei [44][45][46][47][48] have been done by one of us (KPS), since 2000, taking the sum of the Coulomb and proximity potential as the interacting potential. These studies have helped us ensuring the reliability of our model and thus gave us the confidence to extend our study to the area of ternary fission.…”

Half-Lives of Cluster Decay of Neutron Rich Nuclei in Trans-Tin Region

“…9,10 Many theoretical models, both alpha decay like 11 and fission like, [12][13][14] have been proposed to explain CR phenomenon. Half-life values for different modes of cluster decays in both trans-tin region [14][15][16][17][18][19][20][21][22][23][24][25][26][27] and trans-lead 12 region have been calculated by using both alpha-like and fission-like theoretical models. These model based values are available in plenty in literature.…”