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Measurement and covariance analysis of 232Th(n, 2n)231Th reaction cross sections at the effective neutron energies of 8.97 and 16.52 MeV

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Abstract

The \({}_{ }^{ 2 3 2} {\text{Th(n, 2n)}}{}_{ }^{ 2 3 1} {\text{Th}}\) reaction cross sections relative to the \({}_{ }^{ 2 3 2} {\text{Th}}\)(n, f)97Zr monitor reaction at the effective neutron energies of 8.97 and 16.52 MeV have been measured by using the activation and off-line \(\gamma\)-ray spectrometry. The neutron beams were generated from the \({}_{ }^{7} {\text{Li}}\left( {{\text{p}}, {\text{n}}} \right){}_{ }^{7} {\text{Be}}\) reaction by using the proton beam energies of 11 and 18.8 MeV. Correction factors for the low energy neutrons were taken care by considering the thickness of sample and non mono-energetic neutrons. The covariance analysis in the uncertainty of the reaction cross section was carried out by using error propagation and micro-correlation technique. The present data were compared with the literature data, evaluated data and theoretical values based on TALYS-1.8 code.

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Acknowledgements

The research work was supported by DAE-BRNS project (Sanction No. 36(6)/14/52/2014-BRNS/2708). The authors would like to thank the staff of BARC-TIFR Pelletron facility for their kind co-operation in providing the proton beam to carry out the experiment.

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Authors and Affiliations

  1. Department of Statistics, Manipal Academy of Higher Education, Manipal, 576104, India

    Meghna Karkera, Manjunatha Prasad & Santhi Sheela Yeraguntla

  2. Radiochemistry Division, Bhabha Atomic Research Center, Mumbai, 400085, India

    Haladhara Naik

  3. Department of Physics, National Institute of Engineering, Mysuru, 570008, India

    Sripathi Punchithaya

  4. Nuclear Physics Division, Bhabha Atomic Research Center, Mumbai, 400085, India

    Saraswatula Venkata Suryanarayana

  5. DAE, Bhabha Atomic Research Centre, Mumbai, 400085, India

    Srinivasan Ganesan

  6. Maharaja Sayajirao University of Baroda, Vadodara, 390002, India

    Vibha Vansola & Rajnikanth Makhwana

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  1. Meghna Karkera
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Karkera, M., Naik, H., Punchithaya, S. et al. Measurement and covariance analysis of 232Th(n, 2n)231Th reaction cross sections at the effective neutron energies of 8.97 and 16.52 MeV. J Radioanal Nucl Chem 318, 1893–1900 (2018). https://doi.org/10.1007/s10967-018-6199-0

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