Mass Yield Distributions in the 13.75-MeV Quasi-Mono-Energetic Neutron-Induced Fission of 232Th and 238U.
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| Title: | Mass Yield Distributions in the 13.75-MeV Quasi-Mono-Energetic Neutron-Induced Fission of 232Th and 238U. |
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| Authors: | Naik, H.1 (AUTHOR) naikhbarc@yahoo.com, Karkera, Meghna2 (AUTHOR), Vansola, Vibha3 (AUTHOR), Yeraguntla, Santhi Sheela2 (AUTHOR), Mehta, Mayur4 (AUTHOR), Makwana, R.3 (AUTHOR), Suryanarayana, S. V.5 (AUTHOR) |
| Source: | Nuclear Science & Engineering. Aug2026, Vol. 200 Issue 8, p1753-1770. 18p. |
| Abstract: | The cumulative yields of various fission products in the 13.75-MeV quasi-mono-energetic neutron-induced fission of 232Th and 238U have been measured using an off-line γ-ray spectrometric technique. The mass chain yields were obtained from the cumulative yields by applying charge distribution correction. From the mass yield data, the peak-to-valley (P/V) ratio, the average value of light mass (< AL>), heavy mass (< AH>), and the average number of neutrons (<ν>) were obtained. The data from the present work and literature at various neutron energies were compared between the 232Th(n, f) and 238U(n, f) reactions, and the following facts were observed. (1) The mass yield distribution in the 238U(n, f) reaction is double-humped unlike in the 232Th(n, f) reaction, where it is triple-humped. This is due to the different type of potential energy surface for the fissioning system 233Th* than in 239U*. (2) In both reactions, the yields of fission products for A = 133 to 134, A = 138 to 139, and A = 143 to 144 and their complementary products are higher than those of other fission products, which has been explained based on the standard I and standard II asymmetric modes of fission besides the even-odd effect. (3) The yields for A = 133 to 134 are higher in the 238U(n, f) reaction, whereas it is higher for A = 143 to 144 in the 232Th(n, f) reaction, which has been explained based on the presence of shells in the complementary fragments. (4) In both reactions, the yield of symmetric product increases with excitation energy, which causes a decreasing trend in the P/V ratio. (5) At the same excitation energy, the yield of symmetric products is lower in the 238U(n, f) reaction than in the 232Th(n, f) reaction, which causes a higher P/V ratio in the former than in the later. Highlights of this paper include the following: 1. Yields of fission products, which were measured in the 13.75-MeV quasi-mono-energetic neutron-induced fission of 232Th and 238U. 2. An off-line γ–ray spectrometric technique that was employed for the measurement. 3. From the cumulative yields, the mass chain yields, which were obtained by applying the charge distribution correction. 4. Comparison of mass yield distribution parameters that were made in between the 232Th(n, f) and 238U(n, f) reactions. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: enr DbLabel: Energy & Power Source An: 194842678 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Mass Yield Distributions in the 13.75-MeV Quasi-Mono-Energetic Neutron-Induced Fission of <superscript>232</superscript>Th and <superscript>238</superscript>U. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Naik%2C+H%2E%22">Naik, H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> naikhbarc@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Karkera%2C+Meghna%22">Karkera, Meghna</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Vansola%2C+Vibha%22">Vansola, Vibha</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yeraguntla%2C+Santhi+Sheela%22">Yeraguntla, Santhi Sheela</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mehta%2C+Mayur%22">Mehta, Mayur</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Makwana%2C+R%2E%22">Makwana, R.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Suryanarayana%2C+S%2E+V%2E%22">Suryanarayana, S. V.</searchLink><relatesTo>5</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nuclear+Science+%26+Engineering%22">Nuclear Science & Engineering</searchLink>. Aug2026, Vol. 200 Issue 8, p1753-1770. 18p. – Name: Abstract Label: Abstract Group: Ab Data: The cumulative yields of various fission products in the 13.75-MeV quasi-mono-energetic neutron-induced fission of 232Th and 238U have been measured using an off-line γ-ray spectrometric technique. The mass chain yields were obtained from the cumulative yields by applying charge distribution correction. From the mass yield data, the peak-to-valley (P/V) ratio, the average value of light mass (< AL>), heavy mass (< AH>), and the average number of neutrons (<ν>) were obtained. The data from the present work and literature at various neutron energies were compared between the 232Th(n, f) and 238U(n, f) reactions, and the following facts were observed. (1) The mass yield distribution in the 238U(n, f) reaction is double-humped unlike in the 232Th(n, f) reaction, where it is triple-humped. This is due to the different type of potential energy surface for the fissioning system 233Th* than in 239U*. (2) In both reactions, the yields of fission products for A = 133 to 134, A = 138 to 139, and A = 143 to 144 and their complementary products are higher than those of other fission products, which has been explained based on the standard I and standard II asymmetric modes of fission besides the even-odd effect. (3) The yields for A = 133 to 134 are higher in the 238U(n, f) reaction, whereas it is higher for A = 143 to 144 in the 232Th(n, f) reaction, which has been explained based on the presence of shells in the complementary fragments. (4) In both reactions, the yield of symmetric product increases with excitation energy, which causes a decreasing trend in the P/V ratio. (5) At the same excitation energy, the yield of symmetric products is lower in the 238U(n, f) reaction than in the 232Th(n, f) reaction, which causes a higher P/V ratio in the former than in the later. Highlights of this paper include the following: 1. Yields of fission products, which were measured in the 13.75-MeV quasi-mono-energetic neutron-induced fission of 232Th and 238U. 2. An off-line γ–ray spectrometric technique that was employed for the measurement. 3. From the cumulative yields, the mass chain yields, which were obtained by applying the charge distribution correction. 4. Comparison of mass yield distribution parameters that were made in between the 232Th(n, f) and 238U(n, f) reactions. [ABSTRACT FROM AUTHOR] |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1080/00295639.2025.2545160 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1753 Titles: – TitleFull: Mass Yield Distributions in the 13.75-MeV Quasi-Mono-Energetic Neutron-Induced Fission of 232Th and 238U. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Naik, H. – PersonEntity: Name: NameFull: Karkera, Meghna – PersonEntity: Name: NameFull: Vansola, Vibha – PersonEntity: Name: NameFull: Yeraguntla, Santhi Sheela – PersonEntity: Name: NameFull: Mehta, Mayur – PersonEntity: Name: NameFull: Makwana, R. – PersonEntity: Name: NameFull: Suryanarayana, S. V. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00295639 Numbering: – Type: volume Value: 200 – Type: issue Value: 8 Titles: – TitleFull: Nuclear Science & Engineering Type: main |
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