Abstract
We have made a new determination of the half-life of the radioactive isotope using high precision measurements of the number of atoms and their activity in a sample containing over atoms. Our new value for the half-life of is , significantly above the previously reported value of . Our new measurement for the lifetime of has significant implications for interpretations of galactic nucleosynthesis, for determinations of formation time scales of solids in the early Solar System, and for the interpretation of live measurements from supernova-ejecta deposits on Earth.
- Received 25 March 2009
DOI:https://doi.org/10.1103/PhysRevLett.103.072502
©2009 American Physical Society