Indication for supernova produced Fe-60 activity on earth

Authors
Knie, K Korschinek, G Faestermann, T Wallner, C Scholten, J Hillebrandt, W
Citation
K. Knie et al., Indication for supernova produced Fe-60 activity on earth, PHYS REV L, 83(1), 1999, pp. 18-21
Citations number
33
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
00319007 → ACNP
Volume
83
Issue
1
Year of publication
1999
Pages
18 - 21
Database
ISI
SICI code
0031-9007(19990705)83:1<18:IFSPFA>2.0.ZU;2-H
Abstract
In a deep ocean ferromanganese crust an excess of Fe-60 radioactivity was m easured by means of high sensitivity accelerator mass spectrometry. The enh anced concentrations measured in the first two of three layers (correspondi ng to a time span of 0-2.8 Myr and 3.7-5.9 Myr, respectively) suggest the d eposition of supernova produced Fe-60 on earth. There is even a weak indica tion that the flux into the crust was higher about 5 Myr ago.