Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2009-09-30
Publications of the Astronomical Society of Australia 26(3), 2009, 297-302
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
Publications of the Astronomical Society of Australia, Contribution to PASA special volume "The Origin of Elements Heavier tha
Scientific paper
10.1071/AS08039
Knowledge about the age of presolar grains provides important insights into Galactic chemical evolution and the dynamics of grain formation and destruction processes in the Galaxy. Determination from the abundance of cosmic ray interaction products is straightforward, but in the past has suffered from uncertainties in correcting for recoil losses of spallation products. The problem is less serious in a class of large (tens of micrometer) grains. We describe the correction procedure and summarise results for He and Ne ages of presolar SiC "Jumbo" grains that range from close to zero to ~850 Myr, with the majority being less than 200 Myr. We also discuss the possibility of extending our approach to the majority of smaller SiC grains and explore possible contributions from trapping of cosmic rays.
Amari Sachiko
Gyngard Frank
Heck Ph. R.
Ott Ulrich
Wieler Rainer
No associations
LandOfFree
He and Ne ages of large presolar silicon carbide grains: Solving the recoil problem does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with He and Ne ages of large presolar silicon carbide grains: Solving the recoil problem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and He and Ne ages of large presolar silicon carbide grains: Solving the recoil problem will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-589502