Abstract
The spectrum-averaged cross-sections of natGd(γ, xn)159,153Gd reactions induced by the bremsstrahlung end-point energies of 12, 14, 16. 60, 65, and 70 MeV were measured by activation and off-line γ-ray spectrometric technique using the 20 MeV electron linac (ELBE) at HZDR, Dresden, Germany, and 100 MeV electron linac at Pohang Accelerator Laboratory, Korea. The TALYS 1.9 code was also used to calculate the theoretical natGd(γ, xn)159,153Gd reaction cross-sections as a function of photon energy. The spectrum-averaged values at various end-point energies were calculated from the literature data as well as theoretical values based on the TALYS 1.9 code, which is for mono-energetic photons. They were found to be in good agreement with the flux-weighted values of the current experimental data. It was also observed that the experimental and theoretical cross-sections increase from the threshold values to a certain energy, at which point another reaction channel opens, indicating the role of excitation energy. Individual reaction cross-sections decrease after a certain value as bremsstrahlung energy increases due to the opening of other reactions, indicating energy shearing among the different reaction channels.
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This manuscript has associated data in a data repository. [Authors’ comment: All data used in this paper are deposited in the EXFOR and TENDL data libray, and the data produced in this will be deposited in the EXFOR].
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Acknowledgements
The authors would like to thank the staff of the electron LINAC (ELBE) at HZDR in Dresden, Germany, and PAL in Pohang, Korea for providing the electron beam used in the experiments. Dr. H. Naik, one of the authors, expressed gratitude to the BRAIN pool program of KOFEST, Korea, for inviting him as a visiting professor to the department of high-energy physics in Daegu, as well as providing financial support for his trip to Dresden, Germany, to carry out the experiment. This study was partially funded by the National Research Foundation of Korea (NRF) through a grant from the Korean Ministry of Education, Science, and Technology (NRF-2017R1D1A1B03030484, NRF-2018R1A6A1A06024970, and NRF-2019H1D3A2A01102637).
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Communicated by T. Nakamura.
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Naik, H., Kim, G.N., Schwengner, R. et al. Photo-neutron cross-section of natGd in the bremsstrahlung end-point energies of 12–16 MeV and 60–70 MeV. Eur. Phys. J. A 58, 92 (2022). https://doi.org/10.1140/epja/s10050-022-00736-4
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DOI: https://doi.org/10.1140/epja/s10050-022-00736-4