Long-lived radio-isotopes: Unique signatures of close-by supernovae in the past

Gunther Korschinek and Thomas Faestermann

Keywords

Long-lived radio-isotopes, AMS, Supernova

Abstract

_s15The experiments searching in solar system bodies for freshly produced radionuclides from outside the solar system are reviewed, with a special focus on accelerator mass spectrometry. A surplus of 60Fe has been found at eight locations in terrestrial oceans as well as in lunar samples. This surplus is attributed to supernova activity within 300 light years from the Sun about 1.5 to 3.0 Ma ago. An intensive search for the r-process nuclide 244Pu in deep-ocean material yielded an upper limit far below the expectation if it were produced exclusively by core-collapse supernovae. Thus, a much less frequent stellar event than core-collapse supernovae must be the site where the heaviest nuclides are produced._s15

Information

Published
2019 as article
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 438 - page(s): 148 - 155
Contact
Dr. Thomas Faestermann
Type
experimental work
Links
www.sciencedirect.co…
Related to the research area(s):
G

Technische Universitaet Muenchen
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