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Published October 2001 | public
Journal Article

Radioactive clocks and cosmic-ray transport in the galaxy


There are a number of radioactive 'clocks' in the cosmic radiation that can be used to measure the time scales for cosmic ray processes in the Galaxy. With high-resolution isotope measurements available from ACE it is now possible to read these clocks with greatly improved accuracy and address key questions about the origin and lifetime of cosmic rays. This paper discusses the status of three such investigations.

Additional Information

© 2001 Kluwer Academic Publishers. Received 14 September 2000; Accepted in final form: 15 March 2001. This work was supported by NASA (under NAG5-6912) at the California Institute of Technology, the Jet Propulsion Laboratory, Washington University, and Goddard Space Flight Center. We appreciate the hospitality of the International Space Science Institute in hosting this workshop.

Additional details

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October 17, 2023