Photoneutron cross section measurements on $^{208}$Pb in the Giant Dipole Resonance region
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| Natura: | Preprint |
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2024
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| author | Gheorghe, I. Goriely, S. Wagner, N. Aumann, T. Baumann, M. van Beek, P. Kuchenbrod, P. Scheit, H. Symochko, D. Ari-izumi, T. Garrote, F. L. Bello Eriksen, T. Paulsen, W. Pedersen, L. G. Reaz, F. Ingeberg, V. W. Belyshev, S. Miyamoto, S. Utsunomiya, H. |
| author_facet | Gheorghe, I. Goriely, S. Wagner, N. Aumann, T. Baumann, M. van Beek, P. Kuchenbrod, P. Scheit, H. Symochko, D. Ari-izumi, T. Garrote, F. L. Bello Eriksen, T. Paulsen, W. Pedersen, L. G. Reaz, F. Ingeberg, V. W. Belyshev, S. Miyamoto, S. Utsunomiya, H. |
| contents | Photoneutron reactions on $^{208}$Pb 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 $^3$He neutron detection system along with associated neutron-multiplicity sorting methods. We report absolute cross sections and mean photoneutron energies for the $^{208}$Pb$(γ,\,inX)$ reactions with $i$~=~1 to 4. The fine structure present in the $^{208}$Pb$(γ,\,n)$ 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 $^{208}$Pb$(γ,\,n)$ photoneutron energy spectra and on the partial photoneutron cross sections for leaving the residual $^{207}$Pb in its ground and first two excited states. The present results are compared with data from the literature and statistical model calculations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2403_11547 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photoneutron cross section measurements on $^{208}$Pb in the Giant Dipole Resonance region Gheorghe, I. Goriely, S. Wagner, N. Aumann, T. Baumann, M. van Beek, P. Kuchenbrod, P. Scheit, H. Symochko, D. Ari-izumi, T. Garrote, F. L. Bello Eriksen, T. Paulsen, W. Pedersen, L. G. Reaz, F. Ingeberg, V. W. Belyshev, S. Miyamoto, S. Utsunomiya, H. Nuclear Experiment Photoneutron reactions on $^{208}$Pb 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 $^3$He neutron detection system along with associated neutron-multiplicity sorting methods. We report absolute cross sections and mean photoneutron energies for the $^{208}$Pb$(γ,\,inX)$ reactions with $i$~=~1 to 4. The fine structure present in the $^{208}$Pb$(γ,\,n)$ 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 $^{208}$Pb$(γ,\,n)$ photoneutron energy spectra and on the partial photoneutron cross sections for leaving the residual $^{207}$Pb in its ground and first two excited states. The present results are compared with data from the literature and statistical model calculations. |
| title | Photoneutron cross section measurements on $^{208}$Pb in the Giant Dipole Resonance region |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2403.11547 |