Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting
The observation of mass-asymmetric fission in neutron-deficient 180Hg dramatically expanded the region of mass-asymmetric fission found across the nuclide chart, and has led to intense experimental and theoretical investigations into the fission of sub-lead nuclei. In particular, two major questions...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-02-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269322007894 |
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| author | B.M.A. Swinton-Bland J. Buete D.J. Hinde M. Dasgupta T. Tanaka A.C. Berriman D.Y. Jeung K. Banerjee L.T. Bezzina I.P. Carter K.J. Cook C. Sengupta C. Simenel E.C. Simpson M.A. Stoyer |
| author_facet | B.M.A. Swinton-Bland J. Buete D.J. Hinde M. Dasgupta T. Tanaka A.C. Berriman D.Y. Jeung K. Banerjee L.T. Bezzina I.P. Carter K.J. Cook C. Sengupta C. Simenel E.C. Simpson M.A. Stoyer |
| author_sort | B.M.A. Swinton-Bland |
| collection | DOAJ |
| description | The observation of mass-asymmetric fission in neutron-deficient 180Hg dramatically expanded the region of mass-asymmetric fission found across the nuclide chart, and has led to intense experimental and theoretical investigations into the fission of sub-lead nuclei. In particular, two major questions have been raised: how many fission modes are present in the fission of sub-lead nuclides, and which shells dictate these modes?Notably, investigations of the fission modes of 178Pt have led to contrasting results. To solve this disparity, new high-statistics data have been measured at the lowest excitation energy to-date using the CUBE fission spectrometer at The Australian National University. A new fitting procedure was developed to fit the high-statistics two-dimensional mass-kinetic energy distribution without external constraints.The fission of 178Pt can best be described by three fission modes: one mass-symmetric and two mass-asymmetric. Comparisons to previous analyses highlight the necessity of fitting the two-dimensional mass-kinetic energy distribution, rather than fitting slices of individual one-dimensional projections of the full distribution. Systematic studies of high-statistics measurements, combined with a rigorous statistical analysis offer the best chance to determine the shell effects responsible for multi-modal mass-asymmetric fission in this region of the nuclide chart. |
| first_indexed | 2024-04-10T20:48:06Z |
| format | Article |
| id | doaj.art-81a60c6d739f4f58a9abbb55e31e6fe4 |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-04-10T20:48:06Z |
| publishDate | 2023-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-81a60c6d739f4f58a9abbb55e31e6fe42023-01-24T04:07:21ZengElsevierPhysics Letters B0370-26932023-02-01837137655Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fittingB.M.A. Swinton-Bland0J. Buete1D.J. Hinde2M. Dasgupta3T. Tanaka4A.C. Berriman5D.Y. Jeung6K. Banerjee7L.T. Bezzina8I.P. Carter9K.J. Cook10C. Sengupta11C. Simenel12E.C. Simpson13M.A. Stoyer14Department 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, 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, 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, AustraliaDepartment of Nuclear Physics and Accelerator Applications, Research School of Physics, Australian National University, Canberra, ACT 2601, Australia; Nuclear and Chemical Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA 94550, USAThe observation of mass-asymmetric fission in neutron-deficient 180Hg dramatically expanded the region of mass-asymmetric fission found across the nuclide chart, and has led to intense experimental and theoretical investigations into the fission of sub-lead nuclei. In particular, two major questions have been raised: how many fission modes are present in the fission of sub-lead nuclides, and which shells dictate these modes?Notably, investigations of the fission modes of 178Pt have led to contrasting results. To solve this disparity, new high-statistics data have been measured at the lowest excitation energy to-date using the CUBE fission spectrometer at The Australian National University. A new fitting procedure was developed to fit the high-statistics two-dimensional mass-kinetic energy distribution without external constraints.The fission of 178Pt can best be described by three fission modes: one mass-symmetric and two mass-asymmetric. Comparisons to previous analyses highlight the necessity of fitting the two-dimensional mass-kinetic energy distribution, rather than fitting slices of individual one-dimensional projections of the full distribution. Systematic studies of high-statistics measurements, combined with a rigorous statistical analysis offer the best chance to determine the shell effects responsible for multi-modal mass-asymmetric fission in this region of the nuclide chart.http://www.sciencedirect.com/science/article/pii/S0370269322007894Nuclear fissionNeutron-deficient nucleiMass-asymmetric fissionDeformed shell gapsSub-lead fissionMass-kinetic energy |
| spellingShingle | B.M.A. Swinton-Bland J. Buete D.J. Hinde M. Dasgupta T. Tanaka A.C. Berriman D.Y. Jeung K. Banerjee L.T. Bezzina I.P. Carter K.J. Cook C. Sengupta C. Simenel E.C. Simpson M.A. Stoyer Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting Physics Letters B Nuclear fission Neutron-deficient nuclei Mass-asymmetric fission Deformed shell gaps Sub-lead fission Mass-kinetic energy |
| title | Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting |
| title_full | Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting |
| title_fullStr | Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting |
| title_full_unstemmed | Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting |
| title_short | Multi-modal mass-asymmetric fission of 178Pt from simultaneous mass-kinetic energy fitting |
| title_sort | multi modal mass asymmetric fission of 178pt from simultaneous mass kinetic energy fitting |
| topic | Nuclear fission Neutron-deficient nuclei Mass-asymmetric fission Deformed shell gaps Sub-lead fission Mass-kinetic energy |
| url | http://www.sciencedirect.com/science/article/pii/S0370269322007894 |
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