Direct mass measurements of neutron-rich zinc and gallium isotopes: an investigation of the formation of the first r-process peak
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| Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2023
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| _version_ | 1866916569014075392 |
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| author | Jacobs, Andrew Nikas, Stylianos Ash, John Ashrafkhani, Behnam Belosovic, Ivana Bergmann, Julian Brown, Callum Cardona, Jaime Dunling, Eleanor Dickel, Timo Egoriti, Luca Gelinas, Gabriella Hockenbery, Zach Kakkar, Sakshi Kootte, Brian Molaebrahimi, Ali Lykiardopoulou, Eleni Marina Murboeck, Tobias Paul, Stefan Plass, Wolfgang R. Porter, William S. Simpson, Rane Walls, Coulter Wang, Yilin Dilling, Jens Kwiatkowski, Ania |
| author_facet | Jacobs, Andrew Nikas, Stylianos Ash, John Ashrafkhani, Behnam Belosovic, Ivana Bergmann, Julian Brown, Callum Cardona, Jaime Dunling, Eleanor Dickel, Timo Egoriti, Luca Gelinas, Gabriella Hockenbery, Zach Kakkar, Sakshi Kootte, Brian Molaebrahimi, Ali Lykiardopoulou, Eleni Marina Murboeck, Tobias Paul, Stefan Plass, Wolfgang R. Porter, William S. Simpson, Rane Walls, Coulter Wang, Yilin Dilling, Jens Kwiatkowski, Ania |
| contents | The prediction of isotopic abundances resulting from the rapid neutron capture process (r-process) requires high-precision mass measurements. Using TITAN's on-line time-of-flight spectrometer, first time mass measurements are performed for $^{83}$Zn and $^{86}$Ga. These measurements reduced uncertainties, and are used to calculate isotopic abundances near the first r-process abundance peak using astrophysical conditions present during a binary neutron star (BNS) merger. Good agreement in abundance across a range of trajectories is found when comparing to several metal-poor stars while also strongly deviating from the solar r-process pattern. These findings point to a high degree of sensitivity to the electron fraction of a BNS merger on the final elemental abundance pattern for certain elements near the first r-process peak while others display universality. We find that small changes in electron fraction can produce distinct abundance patterns that match those of metal-poor stars with different classifications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2309_11716 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Direct mass measurements of neutron-rich zinc and gallium isotopes: an investigation of the formation of the first r-process peak Jacobs, Andrew Nikas, Stylianos Ash, John Ashrafkhani, Behnam Belosovic, Ivana Bergmann, Julian Brown, Callum Cardona, Jaime Dunling, Eleanor Dickel, Timo Egoriti, Luca Gelinas, Gabriella Hockenbery, Zach Kakkar, Sakshi Kootte, Brian Molaebrahimi, Ali Lykiardopoulou, Eleni Marina Murboeck, Tobias Paul, Stefan Plass, Wolfgang R. Porter, William S. Simpson, Rane Walls, Coulter Wang, Yilin Dilling, Jens Kwiatkowski, Ania Nuclear Experiment The prediction of isotopic abundances resulting from the rapid neutron capture process (r-process) requires high-precision mass measurements. Using TITAN's on-line time-of-flight spectrometer, first time mass measurements are performed for $^{83}$Zn and $^{86}$Ga. These measurements reduced uncertainties, and are used to calculate isotopic abundances near the first r-process abundance peak using astrophysical conditions present during a binary neutron star (BNS) merger. Good agreement in abundance across a range of trajectories is found when comparing to several metal-poor stars while also strongly deviating from the solar r-process pattern. These findings point to a high degree of sensitivity to the electron fraction of a BNS merger on the final elemental abundance pattern for certain elements near the first r-process peak while others display universality. We find that small changes in electron fraction can produce distinct abundance patterns that match those of metal-poor stars with different classifications. |
| title | Direct mass measurements of neutron-rich zinc and gallium isotopes: an investigation of the formation of the first r-process peak |
| topic | Nuclear Experiment |
| url | https://arxiv.org/abs/2309.11716 |