Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)
Measurements of mass and angular distributions have been made for fission-like outcomes in reactions forming isotopes of flerovium (Z=114), using 48Ca, 50Ti, and 54Cr projectiles. The dominant fast quasifission process, which masks the presence of fusion-fission, has minimum yield at the most backwa...
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Elsevier
2021-09-01
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| Series: | Physics Letters B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269321005414 |
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| author | K. Banerjee D.J. Hinde M. Dasgupta J. Sadhukhan E.C. Simpson D.Y. Jeung C. Simenel B.M.A. Swinton-Bland E. Williams L.T. Bezzina I.P. Carter K.J. Cook H.M. Albers Ch.E. Düllmann J. Khuyagbaatar B. Kindler B. Lommel C. Mokry E. Prasad J. Runke N. Schunck C. Sengupta J.F. Smith P. Thörle-Pospiech N. Trautmann K. Vo-Phuoc J. Walshe A. Yakushev |
| author_facet | K. Banerjee D.J. Hinde M. Dasgupta J. Sadhukhan E.C. Simpson D.Y. Jeung C. Simenel B.M.A. Swinton-Bland E. Williams L.T. Bezzina I.P. Carter K.J. Cook H.M. Albers Ch.E. Düllmann J. Khuyagbaatar B. Kindler B. Lommel C. Mokry E. Prasad J. Runke N. Schunck C. Sengupta J.F. Smith P. Thörle-Pospiech N. Trautmann K. Vo-Phuoc J. Walshe A. Yakushev |
| author_sort | K. Banerjee |
| collection | DOAJ |
| description | Measurements of mass and angular distributions have been made for fission-like outcomes in reactions forming isotopes of flerovium (Z=114), using 48Ca, 50Ti, and 54Cr projectiles. The dominant fast quasifission process, which masks the presence of fusion-fission, has minimum yield at the most backward angles, where the sensitivity to fusion-fission is thus highest. In fitting the backward angle mass spectra, only weak evidence for a component of super-asymmetric fission was found, but a near-symmetric fission component was consistently required for the 48Ca + 244Pu reaction, giving upper limit to the fusion probabilities PCN of ∼10−2, ∼5 times lower than previous results. PCN for the 50Ti reaction was lower than 48Ca, whilst no evidence of fusion-fission was found for the 54Cr reaction. |
| first_indexed | 2024-12-22T13:06:10Z |
| format | Article |
| id | doaj.art-bd43308b16d8416e8cfb65dcb63bd61c |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-22T13:06:10Z |
| publishDate | 2021-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-bd43308b16d8416e8cfb65dcb63bd61c2022-12-21T18:24:52ZengElsevierPhysics Letters B0370-26932021-09-01820136601Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114)K. Banerjee0D.J. Hinde1M. Dasgupta2J. Sadhukhan3E.C. Simpson4D.Y. Jeung5C. Simenel6B.M.A. Swinton-Bland7E. Williams8L.T. Bezzina9I.P. Carter10K.J. Cook11H.M. Albers12Ch.E. Düllmann13J. Khuyagbaatar14B. Kindler15B. Lommel16C. Mokry17E. Prasad18J. Runke19N. Schunck20C. Sengupta21J.F. Smith22P. Thörle-Pospiech23N. Trautmann24K. Vo-Phuoc25J. Walshe26A. Yakushev27Department of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia; Corresponding author.Department of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaVariable Energy Cyclotron Centre, 1/AF, Bidhan Nagar, Kolkata-700064, India; Homi Bhabha National Institute, Anushakti Nagar, Mumbai 400094, IndiaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia; Department of Theoretical Physics, Research School of Physics, Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, Australia; Facility for Rare Isotope Beams, Michigan State University, 640 South Shaw Lane, East Lansing, MI 48824, USASHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanySHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany; SHE Chemistry Section, Helmholtz Institute Mainz, 55099, Mainz, Germany; Department of Chemistry - TRIGA Site, Johannes Gutenberg-Universität Mainz, 55099, Mainz, GermanySHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany; SHE Chemistry Section, Helmholtz Institute Mainz, 55099, Mainz, GermanyTarget Laboratory, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanyTarget Laboratory, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, GermanySHE Chemistry Section, Helmholtz Institute Mainz, 55099, Mainz, GermanyDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaSHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany; Department of Chemistry - TRIGA Site, Johannes Gutenberg-Universität Mainz, 55099, Mainz, GermanyNuclear and Chemical Science Division, Lawrence Livermore National Laboratory, Livermore, CA 94551, USADepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaSHE Chemistry Section, Helmholtz Institute Mainz, 55099, Mainz, Germany; Department of Chemistry - TRIGA Site, Johannes Gutenberg-Universität Mainz, 55099, Mainz, GermanyDepartment of Chemistry - TRIGA Site, Johannes Gutenberg-Universität Mainz, 55099, Mainz, GermanyDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaDepartment of Nuclear Physics, Research School of Physics, The Australian National University, Canberra, ACT 2601, AustraliaSHE Chemistry Department, GSI Helmholtzzentrum für Schwerionenforschung, 64291 Darmstadt, Germany; SHE Chemistry Section, Helmholtz Institute Mainz, 55099, Mainz, GermanyMeasurements of mass and angular distributions have been made for fission-like outcomes in reactions forming isotopes of flerovium (Z=114), using 48Ca, 50Ti, and 54Cr projectiles. The dominant fast quasifission process, which masks the presence of fusion-fission, has minimum yield at the most backward angles, where the sensitivity to fusion-fission is thus highest. In fitting the backward angle mass spectra, only weak evidence for a component of super-asymmetric fission was found, but a near-symmetric fission component was consistently required for the 48Ca + 244Pu reaction, giving upper limit to the fusion probabilities PCN of ∼10−2, ∼5 times lower than previous results. PCN for the 50Ti reaction was lower than 48Ca, whilst no evidence of fusion-fission was found for the 54Cr reaction.http://www.sciencedirect.com/science/article/pii/S0370269321005414Superheavy elementNuclear fission dynamicsMicroscopic model calculations |
| spellingShingle | K. Banerjee D.J. Hinde M. Dasgupta J. Sadhukhan E.C. Simpson D.Y. Jeung C. Simenel B.M.A. Swinton-Bland E. Williams L.T. Bezzina I.P. Carter K.J. Cook H.M. Albers Ch.E. Düllmann J. Khuyagbaatar B. Kindler B. Lommel C. Mokry E. Prasad J. Runke N. Schunck C. Sengupta J.F. Smith P. Thörle-Pospiech N. Trautmann K. Vo-Phuoc J. Walshe A. Yakushev Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114) Physics Letters B Superheavy element Nuclear fission dynamics Microscopic model calculations |
| title | Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114) |
| title_full | Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114) |
| title_fullStr | Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114) |
| title_full_unstemmed | Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114) |
| title_short | Sensitive search for near-symmetric and super-asymmetric fusion-fission of the superheavy element Flerovium (Z=114) |
| title_sort | sensitive search for near symmetric and super asymmetric fusion fission of the superheavy element flerovium z 114 |
| topic | Superheavy element Nuclear fission dynamics Microscopic model calculations |
| url | http://www.sciencedirect.com/science/article/pii/S0370269321005414 |
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