The dynamical cluster-decay model (DCM), with deformation and orientation effects included, is used to calculate the fusion evaporation residue cross-sections sigma(xn) for x =1,2, 3 and 4 neutrons emission in a fusion reaction Pb-206 + Ca-48 -> No-254* at various Ca-48-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 beta(4i) 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 theta(ci), within one parameter fitting of the neck-length Delta 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 Pb-204,Pb-206,Pb-207,Pb-208-based reactions, the dependence of, say, the 2n-emission yield sigma(2n) 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 Delta R is largest for compound system No-256*, followed by No-255*, No-254* and smallest for No-252*, which means to suggest that the neutrons emission occur earliest for No-256*, then for No-255*, No-254* and finally by No-252*, in complete agreement with experimental data according to which compound system No-256* has the highest cross-section and No-252* the lowest with No-255* and No-254* lying in between. This result is related to the double magicity of both the target (Pb-208) and projectile (Ca-48) 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. (C) 2015 Elsevier B.V. All rights reserved.