NRV: Evaporation residue cross section

Reaction: 16O + 154Sm  50 MeV ≤ Ecm ≤ 80 MeV (∆E=2 MeV) use empirical formula for the CN formation probability (PCN) [5] (otherwise PCN=1) calculate fission Z-N yield for fission events [6] (for Monte-Carlo only) Decay of fragments   Experimental data: Default values of all parameters Fission width Kramers factor: β 1021 s-1 ħωg.s. MeV ħωsd MeV Fission delay: τdelay 10-21 s Level-density parameter: α β γ Moment of inertia: Collective enhancement of level density Kcoll=Krot(E)·φ(β2)+Kvib(E)·(1-φ(β2))  [2] Kcoll=Krot(E) (deformed nuclei case) Kcoll=Kvib(E) (spherical nuclei case) Deformation dependence of collective enhancement β20 Δβ2 Energy dependence of collective enhancement Ecr MeV ΔEcr MeV Krot= · Kvib=exp( A2/3T4/3)  [3] Kvib= ·βeff2·  [4] βeff= + ΔN + ΔZ ΔN (ΔZ) are the absolute values of the numbers of neutrons (protons) above or below nearest shell closure Monte-Carlo simulation (all possible channels) Multifold integration (1n-4n channels) [1] - A.V. Ignatyuk, et al., Sov. J. Nucl. Phys., 1975, vol.21, p.612; ibid., p.255 [2] - V.I. Zagrebaev, et al., Phys. Rev., 2001, vol.C65, p.014607 [3] - A.V. Ignatyuk, The statistical properties of the excited atomic nuclei (Energoatomizdat, Moscow, 1983) [4] - A.R. Junghans, et al., Nucl. Phys., 1998, vol.A629, p.635 [5] - V. Zagrebaev and W. Greiner, Phys. Rev. C 78 (2008) 034610.