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Measurement and covariance analysis of 140Ce(n,2n)139Ce and 142Ce(n,2n)141Ce reactions with the neutron energy of 13.5 MeV

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Abstract

The (n,2n) reaction cross sections of cerium isotopes have been experimentally measured at the neutron energy of 13.50 ± 0.15 MeV by using the method of activation and off-line γ-ray spectroscopy. The neutron energy was obtained from the D-T reaction using the Purnima Neutron Generator at BARC. The natCe sample was irradiated along with the gold and indium monitor foils. The cross sections of 140Ce(n,2n)139Ce and 142Ce(n,2n)141Ce reactions were measured by using both the gold and indium as a monitor and then collapsed to get the best values of reactions cross sections. The uncertainties in the measured cross sections of 140Ce(n,2n)139Ce and 142Ce(n,2n)141Ce reactions were determined using covariance analysis by considering uncertainties in various attributes. The measured values from the present work were compared with the literature data based on EXFOR compilation, evaluated data from different libraries and theoretically calculated values from TALYS-1.95 and EMPIRE-3.2.

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Acknowledgements

One of the author, Sachhidananda,would like to thank the Department of Atomic Energy and Board of Research in Nuclear Sciences(Sanction No. 36(6)/14/92/2014-BRNS/2727) and the staff of Purnima Neutron Generator facility for their support to carryout the neutron irradiation experiment.

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Correspondence to S. R. Manohara.

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Sachhidananda, H.B., Manohara, S.R., Sunitha, A.M. et al. Measurement and covariance analysis of 140Ce(n,2n)139Ce and 142Ce(n,2n)141Ce reactions with the neutron energy of 13.5 MeV. J Radioanal Nucl Chem 325, 885–892 (2020). https://doi.org/10.1007/s10967-020-07292-5

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