2024/03/18 by I. Gheorghe, S. Goriely, Gheorghe, I. +35 · 2 citations
Physics and Astronomy · #FOS: Physical sciences #High-Energy Particle Collisions Research #Nuclear Experiment (nucl-ex) #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions
paper · pdf · doi:10.48550/arxiv.2403.11547
openalex publication_date 2024/03/18 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Photoneutron reactions on 208Pb in the Giant Dipole Resonance energy region have been investigated at the γ-ray beam line of the NewSUBARU facility in Japan. The measurements made use of quasi-monochromatic laser Compton backscattering γ-ray beams in a broad energy range, from the neutron threshold up to 38 MeV, and of a flat-efficiency moderated 3He neutron detection system along with associated neutron-multiplicity sorting methods. We report absolute cross sections and mean photoneutron energies for the 208Pb(γ, inX) reactions with i~=~1 to 4. The fine structure present in the 208Pb(γ, n) cross sections at incident energies lower than 13~MeV has been observed. The photoabsorption cross section has been obtained as the sum of the (γ, inX) reaction cross sections. By reproducing the measured ring-ratio values at excitation energies below the two neutron separation energy, we were able to extract estimations on the 208Pb(γ, n) photoneutron energy spectra and on the partial photoneutron cross sections for leaving the residual 207Pb in its ground and first two excited states. The present results are compared with data from the literature and statistical model calculations.