2018/09/16 by G. Mandaglio, A. Anastasi, F. Curciarello +3 · 7 citations
Physics and Astronomy · #Angular momentum #Atomic and Molecular Physics #Atomic physics #Charge (physics) #Energy (signal processing) #Excitation #Fission #Neutron #Nuclear Physics and Applications #Nuclear physics #Nuclear physics research studies #Particle physics #Physics #Proton #nucl-th
paper · pdf · doi:10.1103/physrevc.98.044616
published in Physical Review C 98(4) (American Institute of Physics) · 9 pages, 6 figures, 2 tables, Accepted for publication on Phys. Rev. C
arxiv created 2018/09/16 · openalex created_date 2018/09/27 · openalex publication_date 2018/10/18 · arxiv updated 2018/10/22 · openalex updated_date 2026/08/05
The properties of deexcitation of the same 220Th compound nucleus (CN) formed by different mass (charge) asymmetric reactions are investigated. It is demonstrated that the effective fission barrier \ensuremath⟨Bfis\ensuremath⟩ value being a function of the excitation energy ECN* is strongly sensitive to the various orbital angular momentum L=\ensuremathℓ\ensuremathℏ distributions of CN formed with the same excitation energy ECN* by the very different entrance channels 16O+204Pb, 40Ar+180Hf, 82Se+138Ba, and 96Zr+124Sn. Consequently, the competition between the fission and evaporation of light particles (neutron, proton, and \ensuremathα particle) processes along the deexcitation cascade of CN depends on the orbital angular momentum distribution of CN. Therefore, the ratio between the evaporation residue cross sections obtained after emission of neutral and charged particles and neutrons only for the same CN with a given excitation energy ECN* is sensitive to the mass (charge) asymmetry of reactants in the entrance channel.