TY - JOUR
T1 - AMS measurements of cosmogenic and supernova-ejected radionuclides in deep-sea sediment cores
AU - Feige, J.
AU - Wallner, A.
AU - Fifield, L. K.
AU - Korschinek, G.
AU - Merchel, S.
AU - Rugel, G.
AU - Steier, P.
AU - Winkler, S. R.
AU - Golser, R.
PY - 2013
Y1 - 2013
N2 - Samples of two deep-sea sediment cores from the Indian Ocean are analyzed with accelerator mass spectrometry (AMS) to search for traces of recent supernova activity ∼2 Myr ago. Here, long-lived radionuclides, which are synthesized in massive stars and ejected in supernova explosions, namely 26Al, 53Mn and 60Fe, are extracted from the sediment samples. The cosmogenic isotope 10Be, which is mainly produced in the Earth's atmosphere, is analyzed for dating purposes of the marine sediment cores. The first AMS measurement results for 10Be and 26Al are presented, which represent for the first time a detailed study in the time period of 1.7-3.1 Myr with high time resolution. Our first results do not support a significant extraterrestrial signal of 26Al above terrestrial background. However, there is evidence that, like 10Be, 26Al might be a valuable isotope for dating of deep-sea sediment cores for the past few million years.
AB - Samples of two deep-sea sediment cores from the Indian Ocean are analyzed with accelerator mass spectrometry (AMS) to search for traces of recent supernova activity ∼2 Myr ago. Here, long-lived radionuclides, which are synthesized in massive stars and ejected in supernova explosions, namely 26Al, 53Mn and 60Fe, are extracted from the sediment samples. The cosmogenic isotope 10Be, which is mainly produced in the Earth's atmosphere, is analyzed for dating purposes of the marine sediment cores. The first AMS measurement results for 10Be and 26Al are presented, which represent for the first time a detailed study in the time period of 1.7-3.1 Myr with high time resolution. Our first results do not support a significant extraterrestrial signal of 26Al above terrestrial background. However, there is evidence that, like 10Be, 26Al might be a valuable isotope for dating of deep-sea sediment cores for the past few million years.
UR - http://www.scopus.com/inward/record.url?scp=84893219510&partnerID=8YFLogxK
U2 - 10.1051/epjconf/20136303003
DO - 10.1051/epjconf/20136303003
M3 - Conference article
AN - SCOPUS:84893219510
SN - 2101-6275
VL - 63
JO - EPJ Web of Conferences
JF - EPJ Web of Conferences
M1 - 03003
T2 - Heavy Ion Accelerator Symposium 2013
Y2 - 8 April 2013 through 12 April 2013
ER -