2023/08/20 by I. S. Timchenko, O. S. Deiev, Timchenko, I. S. +15 · 1 citation
Medicine · Physics and Astronomy · #FOS: Physical sciences #Nuclear Experiment (nucl-ex) #Nuclear Physics and Applications #Radiopharmaceutical Chemistry and Applications #X-ray Spectroscopy and Fluorescence Analysis
paper · pdf · doi:10.48550/arxiv.2308.10339
openalex publication_date 2023/08/20 · openalex created_date 2023/08/23 · openalex updated_date 2026/07/28
The production of the ^180\rmm\rmHf nuclei in the photoproton reaction 181\rmTa(γ,p) was studied at end-point bremsstrahlung energies E_\rmγmax = 35-95 MeV. The experiment was performed at the electron linear accelerator LUE-40 NSC KIPT with the use of the γ activation and off-line γ-ray spectroscopy. The experimental values of the bremsstrahlung flux-averaged cross-sections ⟨σ(E_\rmγmax)⟩_\rmm for the 181\rmTa(γ,p)^180\rmm\rmHf reaction were determined, and at E_\rmγmax > 55 MeV obtained for the first time. The measured values, also as the literature data, are significantly exceed the theoretical flux-averaged cross-sections ⟨σ(E_\rmγmax)⟩_\rmth. The ⟨σ(E_\rmγmax)⟩_\rmth values were calculated using the cross-section σ(E) computed with the TALYS1.95 code for six different level density models. A comparative analysis of the calculated total cross-sections for the reactions 181\rmTa(γ,p)180\rmHf and 181\rmTa(γ,n)180\rmTa was performed. It was shown that the photoproton (γ,p) to photoneutron (γ,n) strength ratio is consistent with the estimates based on the isospin selection rules and the value from the (e,e'p) experiment.