Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis
The cross section of the ^86 Kr( α , n ) ^89 Sr reaction was measured at low energies using the activation technique via the detection of the β ^− emission from the residual ^89 Sr nuclei. The theoretical analysis of the measured cross sections shows that the new data can be well described in the st...
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2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ade4c9 |
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| author | G. G. Kiss S. R. Kovács T. N. Szegedi P. Mohr F. Montes A. Arcones Á. Tóth A. Németh E. Szilágyi M. Kumar Pal M. Braun Z. Halász Z. Elekes Gy. Gyürky T. Szücs |
| author_facet | G. G. Kiss S. R. Kovács T. N. Szegedi P. Mohr F. Montes A. Arcones Á. Tóth A. Németh E. Szilágyi M. Kumar Pal M. Braun Z. Halász Z. Elekes Gy. Gyürky T. Szücs |
| author_sort | G. G. Kiss |
| collection | DOAJ |
| description | The cross section of the ^86 Kr( α , n ) ^89 Sr reaction was measured at low energies using the activation technique via the detection of the β ^− emission from the residual ^89 Sr nuclei. The theoretical analysis of the measured cross sections shows that the new data can be well described in the statistical model using several recent α -nucleus potentials. The resulting astrophysical reaction rate has small uncertainties between about 15% at higher temperatures and up to a factor of 2 at low temperatures. Using this new reaction rate of the ^86 Kr( α , n ) ^89 Sr reaction for the nucleosynthesis in neutrino-driven outflows in core-collapse supernovae leads to well-constrained production ratios for the nuclei slightly above krypton ( Z = 36) like Sr/Zr, Y/Zr, and Mo/Zr. A comparison to observational ratios in metal-poor stars allows to constrain the astrophysical conditions for this weak r -process. |
| format | Article |
| id | doaj-art-ae522cb727ab49d18c8abbad54d949b2 |
| institution | DOAJ |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-ae522cb727ab49d18c8abbad54d949b22025-08-20T03:15:08ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01988217010.3847/1538-4357/ade4c9Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process NucleosynthesisG. G. Kiss0https://orcid.org/0000-0002-6872-916XS. R. Kovács1https://orcid.org/0009-0009-9796-2970T. N. Szegedi2P. Mohr3https://orcid.org/0000-0002-6695-9359F. Montes4https://orcid.org/0000-0001-9849-5555A. Arcones5https://orcid.org/0000-0002-6995-3032Á. Tóth6https://orcid.org/0009-0002-9664-1517A. Németh7E. Szilágyi8https://orcid.org/0000-0003-3210-0121M. Kumar Pal9https://orcid.org/0000-0003-2803-7449M. Braun10Z. Halász11https://orcid.org/0000-0002-4678-5232Z. Elekes12https://orcid.org/0000-0003-0571-8719Gy. Gyürky13https://orcid.org/0000-0003-3779-6463T. Szücs14https://orcid.org/0000-0002-9980-4847HUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.hu; University of Debrecen , H-4001 Debrecen, Egyetem tér 1, HungaryHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huNational Superconducting Cyclotron Laboratory , East Lansing, MI 48824, USA; Joint Institute for Nuclear Astrophysics—CEE, Michigan State University , East Lansing, MI 48824, USAInstitut für Kernphysik, Technische Universität Darmstadt , Schlossgartenstr. 2 D-64289 Darmstadt, Germany; GSI Helmholtzzentrum für Schwerionenforschung GmbH , Planckstr. 1, D-64291 Darmstadt, Germany; Max-Planck-Institut für Kernphysik , Saupfercheckweg 1, 69117 Heidelberg, GermanyHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.hu; University of Debrecen , H-4001 Debrecen, Egyetem tér 1, HungaryHUN-REN Wigner Research Centre for Physics , H-1121 Budapest, 29-33 Konkoly-Thege Miklós út, HungaryHUN-REN Wigner Research Centre for Physics , H-1121 Budapest, 29-33 Konkoly-Thege Miklós út, HungaryHUN-REN Wigner Research Centre for Physics , H-1121 Budapest, 29-33 Konkoly-Thege Miklós út, HungaryHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huHUN-REN Institute for Nuclear Research (ATOMKI) , H-4026 Debrecen, Bem tér 18/c, Hungary ; ggkiss@atomki.huThe cross section of the ^86 Kr( α , n ) ^89 Sr reaction was measured at low energies using the activation technique via the detection of the β ^− emission from the residual ^89 Sr nuclei. The theoretical analysis of the measured cross sections shows that the new data can be well described in the statistical model using several recent α -nucleus potentials. The resulting astrophysical reaction rate has small uncertainties between about 15% at higher temperatures and up to a factor of 2 at low temperatures. Using this new reaction rate of the ^86 Kr( α , n ) ^89 Sr reaction for the nucleosynthesis in neutrino-driven outflows in core-collapse supernovae leads to well-constrained production ratios for the nuclei slightly above krypton ( Z = 36) like Sr/Zr, Y/Zr, and Mo/Zr. A comparison to observational ratios in metal-poor stars allows to constrain the astrophysical conditions for this weak r -process.https://doi.org/10.3847/1538-4357/ade4c9R-processNuclear astrophysicsExplosive nucleosynthesis |
| spellingShingle | G. G. Kiss S. R. Kovács T. N. Szegedi P. Mohr F. Montes A. Arcones Á. Tóth A. Németh E. Szilágyi M. Kumar Pal M. Braun Z. Halász Z. Elekes Gy. Gyürky T. Szücs Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis The Astrophysical Journal R-process Nuclear astrophysics Explosive nucleosynthesis |
| title | Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis |
| title_full | Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis |
| title_fullStr | Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis |
| title_full_unstemmed | Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis |
| title_short | Low-energy Measurement of the 86Kr(α, n)89Sr Reaction Cross Section and Its Impact on Weak R-process Nucleosynthesis |
| title_sort | low energy measurement of the 86kr α n 89sr reaction cross section and its impact on weak r process nucleosynthesis |
| topic | R-process Nuclear astrophysics Explosive nucleosynthesis |
| url | https://doi.org/10.3847/1538-4357/ade4c9 |
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