Publikationen

Limits on Supernova- Associated Fe-60/Al-26 Nucleosynthesis Ratios from Accelerator Mass Spectrometry Measurements of Deep-Sea Sediments

Autor(en)
Jenny Feige, Anton Wallner, Randolf Altmeyer, L. Keith Fifield, Robin Golser, Silke Merchel, Georg Rugel, Peter Steier, Stephen G. Tims, Stephan R. Winkler
Abstrakt

We searched for the presence of Al-26 in deep-sea sediments as a signature of supernova influx. Our data show an exponential dependence of Al-26 with the sample age that is fully compatible with radioactive decay of terrigenic Al-26. The same set of samples demonstrated a clear supernova Fe-60 signal between 1.7 and 3.2 Myr ago. Combining our Al-26 data with the recently reported Fe-60 data results in a lower limit of 0.18(-0.08)(+0.15) for the local interstellar Fe-60/Al-26 isotope ratio. It compares to most of the ratios deduced from nucleosynthesis models and is within the range of the observed average galactic Fe-60/Al-26 flux ratio of (0.15 +/- 0.05).

Organisation(en)
Isotopenphysik
Externe Organisation(en)
Australian National University, Humboldt-Universität zu Berlin, Helmholtz-Zentrum Dresden-Rossendorf, iThemba LABS Lab Accelerator Based Sci, Technische Universität Berlin
Journal
Physical Review Letters
Band
121
Anzahl der Seiten
6
ISSN
0031-9007
DOI
https://doi.org/10.1103/PhysRevLett.121.221103
Publikationsdatum
11-2018
Peer-reviewed
Ja
ÖFOS 2012
103014 Kernphysik, 103004 Astrophysik
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/limits-on-supernova-associated-fe60al26-nucleosynthesis-ratios-from-accelerator-mass-spectrometry-measurements-of-deepsea-sediments(9f69384b-85e6-44e0-90a5-7ba03eb92e65).html