Isotopic Yield in Cold Binary Fission of Even-Even 246-250U Isotopes

Abstract

Abstract:Within the frame work of Coulomb and proximity potential model (CPPM)

Studies on the cold binary fragmentation of even–even 230–250U isotopes

“…The proximity potential has been used broadly for studies in the areas of alpha decay [32][33][34][35], cluster decay [36][37][38][39], ternary fission [40][41][42], alpha decay of heavy and superheavy nuclei [43][44][45] and cluster radioactivity of superheavy nuclei [44]. In the present work, which is an extension of our earlier work [46], we have computed the penetrability and half-lives using the two different proximity potentials for the cold binary fission of 230-250 U isotopes, which were compared with the available experimental data collected from Holden et al [47]. We would like to mention that a similar study has been performed on even-even [244][245][246][247][248][249][250][251][252][253][254][255][256][257][258] Cf isotopes and even-even [238][239][240][241][242][243][244][245][246][247][248] Pu isotopes by Santhosh et al [48,49], where the cold reaction valleys were plotted, and the corresponding barrier penetrability and yields were calculated for all binary fragmentations of the above-mentioned isotopes.…”

“…12, it is clear that, for the 240 U isotope, the highest yield is obtained for the symmetric fragment combination 108 Mo + 132 Sn as it contains a doubly-magic nucleus 132 Sn (N = 82, Z = 50). The next higher yields are for the fragment combinations 36 Si + 204 Pt, 110 Mo + 130 Sn, 42 S + 198 Os, 40 S + 200 Os, 46 Ar + 194 W and 50 Ca + 190 Hf. It is due to the For the 242 U isotope, the highest maximum of the yield belongs to the fragment combination 110 Mo + 132 Sn that contains a doubly-magic nucleus 132 Sn (N = 82, Z = 50).…”

“…For the 232,234,236 U isotopes, the minima obtained in the first region are at 210,212,214 Po and 208,210 Pb, and they are due to the doubly-magic 208 Pb (N = 126, Z = 82), near doubly-magic 210 Po (N = 126, Z = 84), 212 Po (N = 128, Z = 84) and 210 Pb (N = 128, Z = 82). The minima observed in the second region are at 46 Ar (N = 28, Z = 18) and 50 Ca (N = 30, Z = 20). In the third region, minima are observed at 134 Te (N = 82, Z = 52) and 132 Sn (N = 82, Z = 50).…”

“…It is due to the For the 242 U isotope, the highest maximum of the yield belongs to the fragment combination 110 Mo + 132 Sn that contains a doubly-magic nucleus 132 Sn (N = 82, Z = 50). The other various peaks correspond to the fragment combinations 42 S + 200 Os, 46 Ar + 196 W, 112 Mo + 130 Sn, 52 Ca + 190 Hf and 106 Zr + 136 Te. The occurrence of these fragment combinations is attributed to the presence of the near neutron shell closure N = 124 of 200 Os, of the near doubly-magic 46 Ar, 130 Sn, 136 Te nuclei, and of the magic shell Z = 20 of 52 Ca.…”

“…The other various peaks correspond to the fragment combinations 42 S + 200 Os, 46 Ar + 196 W, 112 Mo + 130 Sn, 52 Ca + 190 Hf and 106 Zr + 136 Te. The occurrence of these fragment combinations is attributed to the presence of the near neutron shell closure N = 124 of 200 Os, of the near doubly-magic 46 Ar, 130 Sn, 136 Te nuclei, and of the magic shell Z = 20 of 52 Ca.…”