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Post-neutron mass yield distribution in the thermal neutron induced fission of \({}^{241}\)Pu

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Abstract

The cumulative and independent yields of various fission products within the mass range of 83–115 and 125–157 have been measured in the thermal neutron induced fission of \(^{\mathrm {241}}\hbox {Pu}\) by using radiochemical and off-line \(\gamma \)-ray spectrometric technique. From the cumulative yields, post-neutron mass yields were obtained by using the charge distribution correction. From the mass yields data, full width at tenth maximum (FWTM) of light and heavy mass wings, the average light mass (<A\(_{\mathrm {L}}>\)) and heavy mass (<A\(_{\mathrm {H}}>\)) as well as the average neutrons number (\(<\nu>\)) were obtained. The mass yield data in the \(^{\mathrm {241}}\hbox {Pu}\)(n\(_{\mathrm {th}}\), f) reaction was compared with the similar data of \(^{\mathrm {229}}\)Th(n\(_{\mathrm {th}}\), f) reaction to examine the nuclear structure effect. Surprisingly, different trends of standard I and standard II asymmetric mode of fission were seen in the two fissioning systems due to the different nuclear structure effect.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: Data have been given in the Tables of the manuscript.]

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Acknowledgements

We are thankful to Dr. R.H. Iyer, earlier head of Radiochemistry Division, BARC for his keen interest and support during this work. The authors are also thankful to staff of the reactor APSARA and CIRUS at BARC for their helps for providing the irradiation facility and successfully carrying out the irradiations during experiment.

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Correspondence to H. Naik.

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Communicated by Jose Benlliure.

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Naik, H., Dange, S.P., Jang, W. et al. Post-neutron mass yield distribution in the thermal neutron induced fission of \({}^{241}\)Pu. Eur. Phys. J. A 56, 186 (2020). https://doi.org/10.1140/epja/s10050-020-00184-y

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