Feasibility of observing alpha decay chains from^270–301117 super heavy nuclei

Abstract

The alpha decay of 117 super heavy nuclei is investigated within the Coulomb and proximity potential model for deformed nuclei. We have performed a systematic search for those isotopes of Z = 117 which may be detectable through experiments via alpha decay. We have predicted 3α chains for 293 117 and 6α chains for 294 117 by the comparison of alpha half-lives and spontaneous fission half-lives and it can be seen that our predictions go hand in hand with the experimental observations. Our study reveals that those isotopes of Z = 117 with A 299 and with A 271 do not survive fission and thus the alpha decay is restricted within the range 272

Heavy particle radioactivity from superheavy nuclei leading to 298114 daughter nuclei

“…The Coulomb and proximity potential model (CPPM) [41,42] and its modified version, the Coulomb and proximity potential model for deformed nuclei (CPPMDN) [43] is being used by the Santhosh et al, since the last decade for the cluster decay and alpha decay studies of heavy [44][45][46][47] and superheavy nuclei [48][49][50][51][52]. The recent studies on the α transitions from both the ground state and the isomeric states [53], α fine structure studies of eveneven [43], even-odd [54], odd-even [55] and odd-odd [56] nuclei, studies on the α decay half lives of the isotopes of Bi nuclei [47] and the theoretical predictions on the alpha decay chains of the isotopes of Z = 115 [49], 117 [50,51] and 119 [52] have proved the validity and applicability of both CPPM and CPPMDN. The present paper deals with an investigation on the cluster decay of eveneven clusters 4 He, 8 Be, 10 Be, 14 [30,31], the Universal (UNIV) curve of Poenaru et al [34,35] and the Scaling Law of Horoi et al [57] have been used for the comparison of our calculations.…”

Predictions on the alpha decay half lives of superheavy nuclei with Z= 113 in the range 255 ≤A≤ 314

“…4α chains can be predicted from the isotope by comparing the alpha decay half lives with the spontaneous fission half lives and it is evident that the predictions on the decay modes of the isotope is same as the experimental results. The comparison between experimental and theoretical values of alpha decay half lives and decay modes are given in Table 1 of Ref [63]. Figures 9-15 represents the plots for the isotopes 287 ≤A ≤ 314.…”

Comparative studies for different proximity potentials applied to large cluster radioactivity of nuclei

“…Further, the proximity potential has been subjected to several modifications, and Dutt and Puri [20,21] have been using different versions of proximity potentials for studying the fusion cross sections of different target-projectile combinations. Santhosh et al, have been using the proximity potential as the nuclear potential in the Coulomb and proximity potential model (CPPM) [22], and Coulomb and proximity potential model for deformed nuclei (CPPMDN) [23] for various studies on the cluster decay [24,25,26], alpha decay [27,28,29]. Therefore, by using it, the nuclear potential can be easily determined, especially between cluster radioactivity and different target nuclei.…”