Universality of shell effects in fusion-fission mass distributions
We present the results of a broad, systematic study of heavy-ion induced fission mass distributions for every even-Z compound nucleus (ZCN) from 144Gd to 212Th. We find systematic evidence of shell-driven structure in every fission mass distribution. The change in shape of the mass distributions wit...
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| Language: | English |
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Elsevier
2025-06-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269325002205 |
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| author | J. Buete B.M.A. Swinton-Bland D.J. Hinde K.J. Cook M. Dasgupta A.C. Berriman D.Y. Jeung K. Banerjee L.T. Bezzina I.P. Carter C. Sengupta C. Simenel E.C. Simpson |
| author_facet | J. Buete B.M.A. Swinton-Bland D.J. Hinde K.J. Cook M. Dasgupta A.C. Berriman D.Y. Jeung K. Banerjee L.T. Bezzina I.P. Carter C. Sengupta C. Simenel E.C. Simpson |
| author_sort | J. Buete |
| collection | DOAJ |
| description | We present the results of a broad, systematic study of heavy-ion induced fission mass distributions for every even-Z compound nucleus (ZCN) from 144Gd to 212Th. We find systematic evidence of shell-driven structure in every fission mass distribution. The change in shape of the mass distributions with ZCN is consistent with the results of quantitative simultaneous fitting in mass and total kinetic energy, demonstrating that fragment proton shell gaps at ZFF=34,36 and ZFF=44,46 are both major drivers of fission mass distributions below the actinide region. The mass distributions show enhanced yields at mass symmetry for values of ZCN equal to two times these favoured ZFF values. Thus, the same shell gaps that are drivers of mass-asymmetric fission also affect mass distributions at and near mass-symmetry. For all systems a second, more mass-asymmetric, fission mode is required to fit the fission mass distributions. If driven by a single shell gap, it appears to be in the light fragment around ZFF=28,30. |
| format | Article |
| id | doaj-art-eb1a4a46ce074405b546db97d7a91b41 |
| institution | Kabale University |
| issn | 0370-2693 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj-art-eb1a4a46ce074405b546db97d7a91b412025-08-20T03:52:43ZengElsevierPhysics Letters B0370-26932025-06-0186513945910.1016/j.physletb.2025.139459Universality of shell effects in fusion-fission mass distributionsJ. Buete0B.M.A. Swinton-Bland1D.J. Hinde2K.J. Cook3M. Dasgupta4A.C. Berriman5D.Y. Jeung6K. Banerjee7L.T. Bezzina8I.P. Carter9C. Sengupta10C. Simenel11E.C. Simpson12Department of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia; Corresponding author.Department of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia; Facility for Rare Isotope Beams, Michigan State University, MI 48824, USADepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia; Department of Fundamental and Theoretical Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaWe present the results of a broad, systematic study of heavy-ion induced fission mass distributions for every even-Z compound nucleus (ZCN) from 144Gd to 212Th. We find systematic evidence of shell-driven structure in every fission mass distribution. The change in shape of the mass distributions with ZCN is consistent with the results of quantitative simultaneous fitting in mass and total kinetic energy, demonstrating that fragment proton shell gaps at ZFF=34,36 and ZFF=44,46 are both major drivers of fission mass distributions below the actinide region. The mass distributions show enhanced yields at mass symmetry for values of ZCN equal to two times these favoured ZFF values. Thus, the same shell gaps that are drivers of mass-asymmetric fission also affect mass distributions at and near mass-symmetry. For all systems a second, more mass-asymmetric, fission mode is required to fit the fission mass distributions. If driven by a single shell gap, it appears to be in the light fragment around ZFF=28,30.http://www.sciencedirect.com/science/article/pii/S0370269325002205Heavy-ion induced fissionFissionNuclear reactionsFission mass distributionsSub-lead fissionShell-driven fission |
| spellingShingle | J. Buete B.M.A. Swinton-Bland D.J. Hinde K.J. Cook M. Dasgupta A.C. Berriman D.Y. Jeung K. Banerjee L.T. Bezzina I.P. Carter C. Sengupta C. Simenel E.C. Simpson Universality of shell effects in fusion-fission mass distributions Physics Letters B Heavy-ion induced fission Fission Nuclear reactions Fission mass distributions Sub-lead fission Shell-driven fission |
| title | Universality of shell effects in fusion-fission mass distributions |
| title_full | Universality of shell effects in fusion-fission mass distributions |
| title_fullStr | Universality of shell effects in fusion-fission mass distributions |
| title_full_unstemmed | Universality of shell effects in fusion-fission mass distributions |
| title_short | Universality of shell effects in fusion-fission mass distributions |
| title_sort | universality of shell effects in fusion fission mass distributions |
| topic | Heavy-ion induced fission Fission Nuclear reactions Fission mass distributions Sub-lead fission Shell-driven fission |
| url | http://www.sciencedirect.com/science/article/pii/S0370269325002205 |
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