http://repository.iitr.ac.in/handle/123456789/13657| Title: | Discovery of an Exceptionally Strong β -Decay Transition of F 20 and Implications for the Fate of Intermediate-Mass Stars |
| Authors: | Kirsebom O.S. Jones S. Strömberg D.F. Martínez-Pinedo G. Langanke K. Röpke F.K. Brown B.A. Eronen T. Fynbo H.O.U. Hukkanen M. Idini A. Jokinen A. Kankainen A. Kostensalo J. Moore I. Möller H. Ohlmann S.T. Penttilä H. Riisager K. Rinta-Antila S. Srivastava, Praveen Chandra Suhonen J. Trzaska W.H. Äystö J. |
| Published in: | Physical Review Letters |
| Abstract: | A significant fraction of stars between 7 and 11 solar masses are thought to become supernovae, but the explosion mechanism is unclear. The answer depends critically on the rate of electron capture on Ne20 in the degenerate oxygen-neon stellar core. However, because of the unknown strength of the transition between the ground states of Ne20 and F20, it has not previously been possible to fully constrain the rate. By measuring the transition, we establish that its strength is exceptionally large and that it enhances the capture rate by several orders of magnitude. This has a decisive impact on the evolution of the core, increasing the likelihood that the star is (partially) disrupted by a thermonuclear explosion rather than collapsing to form a neutron star. Importantly, our measurement resolves the last remaining nuclear physics uncertainty in the final evolution of degenerate oxygen-neon stellar cores, allowing future studies to address the critical role of convection, which at present is poorly understood. © 2019 American Physical Society. |
| Citation: | Physical Review Letters (2019), 123(26): - |
| URI: | https://doi.org/10.1103/PhysRevLett.123.262701 http://repository.iitr.ac.in/handle/123456789/13657 |
| Issue Date: | 2019 |
| Publisher: | American Physical Society |
| ISSN: | 319007 |
| Author Scopus IDs: | 23094309400 55574221891 57212676220 7005681637 7005670162 6701421190 57199485682 8865380200 7003283804 57212683383 24483650000 7005718380 8940404400 57193012275 55939296500 57104389800 56433649500 7004415809 11040427800 9838979100 57208202387 7006843910 7006493515 7005156031 |
| Author Affiliations: | Kirsebom, O.S., Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark, Institute for Big Data Analytics, Dalhousie University, Halifax, NS B3H 4R2, Canada Jones, S., Computational Physics (XCP) Division, Los Alamos National LaboratoryNM 87545, United States, Heidelberger Institut für Theoretische Studien, Heidelberg, D-69118, Germany Strömberg, D.F., Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt, Darmstadt, D-64289, Germany, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, D-64291, Germany Martínez-Pinedo, G., Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt, Darmstadt, D-64289, Germany, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, D-64291, Germany Langanke, K., Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt, Darmstadt, D-64289, Germany, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, D-64291, Germany Röpke, F.K., Heidelberger Institut für Theoretische Studien, Heidelberg, D-69118, Germany, Zentrum für Astronomie der Universität Heidelberg, Institut für Theoretische Astrophysik, Heidelberg, D-69120, Germany Brown, B.A., National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, MI 48824, United States Eronen, T., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Fynbo, H.O.U., Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark Hukkanen, M., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Idini, A., Division of Mathematical Physics, Department of Physics, LTH, Lund University, P.O. Box 118, Lund, S-22100, Sweden Jokinen, A., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Kankainen, A., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Kostensalo, J., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Moore, I., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Möller, H., Institut für Kernphysik (Theoriezentrum), Technische Universität Darmstadt, Darmstadt, D-64289, Germany, GSI Helmholtzzentrum für Schwerionenforschung, Darmstadt, D-64291, Germany Ohlmann, S.T., Heidelberger Institut für Theoretische Studien, Heidelberg, D-69118, Germany, Max Planck Computing and Data Facility, Garching, D-85748, Germany Penttilä, H., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Riisager, K., Department of Physics and Astronomy, Aarhus University, Aarhus C, DK-8000, Denmark Rinta-Antila, S., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Srivastava, P.C., Department of Physics, Indian Institute of Technology, Roorkee, 247667, India Suhonen, J., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Trzaska, W.H., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland Äystö, J., Department of Physics, University of Jyväskylä, P.O. Box 35FI-40014, Finland |
| Funding Details: | We are indebted to the technical staff at the JYFL Laboratory and Aarhus University for their assistance with refurbishing the spectrometer, and to the members of the IGISOL-4 group for their support during the experiment. This work has been supported by the Academy of Finland under the Finnish Centre of Excellence Programme (Nuclear and Accelerator Based Physics Research at JYFL 2012–2017) and Academy of Finland Grants No. 275389, No. 284516, No. 295207, and No. 312544. This work was supported by the U.S. Department of Energy LDRD program through the Los Alamos National Laboratory. The Los Alamos National Laboratory is operated by Triad National Security, LLC, for the National Nuclear Security Administration of the U.S. Department of Energy (Contract No. 89233218NCA000001). S. J. acknowledges support from a Director’s Fellowship at Los Alamos National Laboratory. The work of F. K. R., S. J., and S. T. O. was supported by the Klaus Tschira Foundation, and F. K. R. received additional support through the Collaborative Research Center SFB 881 “The Milky Way System” of the German Research Foundation (DFG). B. A. B. acknowledges the support of NSF Grant No. PHY-1811855, and O. S. K. acknowledges support from the Villum Foundation through Project No. 10117. D. F. S. and G. M.-P. acknowledge the support of the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Project No. 279384907–SFB 1245 “Nuclei: From Fundamental Interactions to Structure and Stars”; and the ChETEC COST action (CA16117), funded by COST (European Cooperation in Science and Technology). J. K. acknowledges the financial support of the Jenny and Antti Wihuri Foundation. P. C. S. acknowledges the financial support from the Faculty Initiation Grant (FIG) provided by IIT-Roorkee. A. K. and M. H. acknowledge the support from the European Union’s Horizon 2020 research and innovation program under Grant Agreement No. 771036 (ERC CoG MAIDEN). |
| Appears in Collections: | Journal Publications [PH] |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.