Exotic decay modes of odd-Z (105-119) superheavy nuclei
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Date
2014
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Abstract
Half-lives of proton emission for proton emitters with Z — 51 to 83 are calculated, in the framework
of unified fission model with the penetrability calculated using the WKB appro.ximation. For all
the ground and isomeric state of the proton, the deformation degree of freedom is included. Calculated
half-lives are in good agreement with the experimental ones. Experimentally for a few isotopes, proton and
alpha branches are reported. Hence we have calculated the half-lives of al]jiia deca> for these eleincnis.
For parent nuclei ‘ '^'Ta, “T1 and * ^Tl. the alpha decay mode is preferred ovei the inoio
emission. Further, the calculations are extended to find half-lives of suijerlieavy element with odd juotoii
number in the range Z = 105 to 119, for both proton, alpha and for a few cluster decays. ( 'alciilal ions
on superheavy elements reveal that cluster radioactivity has half-lives comparable with proton emissions.
It is found that proton emission is the prirnai’y competing decay mode with respect to alpha decay foi'
superheavy elements. Among considered clusters, ^^C, and ^“'Mg are found to have lowest half-liv(;s
among other N = Z clusters and for a. few clusters the half-lives are found to be coni]3fUfible with that of
proton emission.