Determination of thermal neutron capture cross-section of cerium isotopes.
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| Title: | Determination of thermal neutron capture cross-section of cerium isotopes. |
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| Authors: | Kanjarpane, Samrudhi R.1 (AUTHOR) samrudhirkanjarpane@gmail.com, Prajapati, P. M.1,2,3 (AUTHOR) paresh.physics@itmbu.ac.in, Shet, Sachin4 (AUTHOR) shet.sachin@manipal.edu, Soni, Bhargav5 (AUTHOR) sonibhargav15@gmail.com, Bhandari, Deep6 (AUTHOR) dbhan@barc.gov.in, Kumar, Rajeev6,7 (AUTHOR) rajeevk@barc.gov.in, Pizzone, R. G.2,8 (AUTHOR) rgpizzone@lns.infn.it, Suryanarayana, S. V.9 (AUTHOR) suryanarayan7@yahoo.com |
| Source: | European Physical Journal A -- Hadrons & Nuclei. Jun2025, Vol. 61 Issue 6, p1-12. 12p. |
| Subjects: | Analysis of covariance, Neutron irradiation, Neutron sources, Value capture, Cerium, Thermal neutrons, Neutron capture |
| Abstract: | The thermal neutron capture cross-section of cerium isotopes 140 Ce and 142 Ce, were measured with detailed covariance analysis using naturally occurring cerium oxide samples. We conducted irradiation with an Am–Be neutron source at the Manipal Institute of Technology and performed offline gamma-ray measurements via High Purity Germanium (HPGe) Detector. The neutron spectrum from the irradiation location was obtained by employing multiple foil activation techniques and spectrum unfolding methods. The present results provide precise thermal neutron capture cross-section data with detailed covariance analysis. The measured cross sections, 0.54 ± 0.03 barns for 140 Ce and 0.83 ± 0.04 barns for cerium-142, are compared with previous measurements and with the latest available evaluated nuclear libraries. It is observed that the presently measured thermal cross-section values of 140 Ce and 142 Ce are lower than the evaluated data but have higher accuracy compared to the previous measurements with larger uncertainties. Further, the measured thermal neutron capture cross-section values of 140 Ce and 142 Ce isotopes are in good agreement with the previous measurements than the evaluations. Thus, the current state of nuclear data evaluation requires improvement for cerium isotopes. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The thermal neutron capture cross-section of cerium isotopes 140 Ce and 142 Ce, were measured with detailed covariance analysis using naturally occurring cerium oxide samples. We conducted irradiation with an Am–Be neutron source at the Manipal Institute of Technology and performed offline gamma-ray measurements via High Purity Germanium (HPGe) Detector. The neutron spectrum from the irradiation location was obtained by employing multiple foil activation techniques and spectrum unfolding methods. The present results provide precise thermal neutron capture cross-section data with detailed covariance analysis. The measured cross sections, 0.54 ± 0.03 barns for 140 Ce and 0.83 ± 0.04 barns for cerium-142, are compared with previous measurements and with the latest available evaluated nuclear libraries. It is observed that the presently measured thermal cross-section values of 140 Ce and 142 Ce are lower than the evaluated data but have higher accuracy compared to the previous measurements with larger uncertainties. Further, the measured thermal neutron capture cross-section values of 140 Ce and 142 Ce isotopes are in good agreement with the previous measurements than the evaluations. Thus, the current state of nuclear data evaluation requires improvement for cerium isotopes. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 14346001 |
| DOI: | 10.1140/epja/s10050-025-01621-6 |
