Abstract
The neutron activation cross-section and ratios of the isomeric cross-section (σm/σg) in 136Xe(n,2n)135m,gXe reactions were measured according to the 93Nb(n,2n)92mNb reference reaction cross-section within the range for neutron spectrum energy 13–15 MeV. High purity and high-pressure natural xenon gas was used as the target sample. Neutrons were generated through the reaction of T(d,n)4He. A lead-shielded HPGe detector was used to measure the γ–ray spectra of the residue product. In the experiment, the true coincidence summing effect, sample counting geometry, the solid angle of the neutron flux, and self-attenuation of the characteristics γ-ray were corrected. A detailed covariance analysis has been performed by using the uncertainty propagation, while the measured cross-sections are being reported with their correlation matrix and uncertainties. Moreover, theoretical calculations were carried out on the TALYS-1.95 platform to obtain the reactions’ cross-sections of 136Xe(n,2n)135m,gXe compositions. Subsequently, the data from the measured cross-sections were compared to the theoretical values, the evaluation data, and the previous experimental results.
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The datasets generated and/or analysed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
We would like to thank the Intense Neutron Generator group at China Academy of Engineering Physics for performing the irradiations. This work is supported by the National Natural Science Foundation of China (Grant Nos. 11875016, 12165006) and College student Science and Technology Innovation Project of Hexi University (Grant No. 110).
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Communicated by Jose Benlliure.
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Luo, J., Liang, J., Jiang, L. et al. Cross-sections and isomeric ratios for the 136Xe(n,2n)135m,gXe reactions in the 14 MeV region with covariance analysis. Eur. Phys. J. A 58, 142 (2022). https://doi.org/10.1140/epja/s10050-022-00797-5
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DOI: https://doi.org/10.1140/epja/s10050-022-00797-5