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• W1999208504 abstract "Abstract The dynamical cluster-decay model (DCM), with deformation and orientation effects included, is used to calculate the fusion evaporation residue cross-sections σ x n for x = 1 , 2 , 3 and 4 neutrons emission in a fusion reaction 206 Pb + 48 Ca → 254 No * at various 48 Ca-beam energies E lab = 212.7 – 242.5 MeV (equivalently, E ⁎ = 19.8 – 43.9 MeV ). Considering the higher multipole deformations up to hexadecapole deformation β 4 i and the sticking moment-of-inertia I S , the DCM with pocket formula for nuclear proximity potential is shown to give a good description of the measured individual light-particle (here neutrons) decay channels for configurations of “hot, compact” orientations θ c i , within one parameter fitting of the neck-length Δ R . A check on some of the variables involved in DCM shows that (i) spherical configurations give nearly the same result as above for deformed and oriented ones; (ii) the non-sticking moment-of-inertia I NS gives unphysical results; and (iii) configurations of “cold, elongated” orientations do not fit the data at all. Furthermore, for the four different isotopes of 204,206,207,208 Pb-based reactions, the dependence of, say, the 2n-emission yield σ 2 n on the isotopic composition of the compound nucleus is also studied within the DCM for “hot” fusion process. Of all the four Pb-isotopes and three excitation energies E ⁎ considered, at each E ⁎ , the Δ R is largest for compound system 256 No * , followed by 255 No * , 254 No * and smallest for 252 No * , which means to suggest that the neutrons emission occur earliest for 256 No * , then for 255 No * , 254 No * and finally by 252 No * , in complete agreement with experimental data according to which compound system 256 No * has the highest cross-section and 252 No * the lowest with 255 No * and 254 No * lying in between. This result is related to the double magicity of both the target ( 208 Pb) and projectile ( 48 Ca) nuclei, as well as to the experimentally known result of projectile with a larger number of neutrons (here the target nucleus Pb) showing an increase in the production cross-section of superheavy nuclei, and is shown to be mainly due to the penetrability factor P in the compound nucleus decay cross-section." @default.
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• W1999208504 date "2015-06-01" @default.
• W1999208504 modified "2023-09-28" @default.
• W1999208504 title "Evaporation residue cross-section in the decay of 254No* formed in 206Pb + 48Ca and its isotopic dependence using other Pb targets within the dynamical cluster-decay model" @default.
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• W1999208504 doi "https://doi.org/10.1016/j.nuclphysa.2015.02.009" @default.
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