Abstract:
A measurement of the 56Ni cosmic ray abundance has been discussed as a possible tool to determine the acceleration time scale of relativistic particles in cosmic rays. This conjecture will depend on the halflife of totally ionized 56Ni which can only decay by higher-order forbidden transitions. We have calculated this halflife within large-scale shell model calculations and find t 1/2≈ 4×104 years, only slightly larger than the currently available experimental lower limit, but too short for 56Ni to serve as a cosmic ray chronometer.
Similar content being viewed by others
Author information
Authors and Affiliations
Additional information
Received: 23 February 1999
Rights and permissions
About this article
Cite this article
Lund Fisker, J., Martínez-Pinedo, G. & Langanke, K. Halflife of 56Ni in cosmic rays . EPJ A 5, 229–231 (1999). https://doi.org/10.1007/s100500050277
Issue Date:
DOI: https://doi.org/10.1007/s100500050277