Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000apj...534..757a&link_type=abstract
The Astrophysical Journal, Volume 534, Issue 2, pp. 757-769.
Astronomy and Astrophysics
Astronomy
19
Balloons, Ism: Cosmic Rays, Nuclear Reactions, Nucleosynthesis, Abundances
Scientific paper
We present data from the second flight of the superconducting magnet instrument for light isotopes (SMILI), which took place on 1991 July 24. This instrument was optimized to determine the isotopic composition of He, Li, Be, and B in the Galactic cosmic rays, up to an energy of 2 GeV amu-1. The abundances of He, Li, and B are found to be consistent with standard models of cosmic-ray propagation. Our measurement of the abundances of the beryllium isotopes suggests an enhancement of the fraction of the isotope 10Be over that found at low energy. Of 26 beryllium events, nine are found to be 10Be. Monte Carlo calculations based on this observation imply the mean lifetime of cosmic rays to be less than 6 Myr at the 97.5% confidence level.
Ahlen Steven P.
Beatty James J.
Bower Charles R.
Clem James
Ficenec D. J.
No associations
LandOfFree
Measurement of the Isotopic Composition of Cosmic-Ray Helium, Lithium, Beryllium, and Boron up to 1700 MEV per Atomic Mass Unit 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 Measurement of the Isotopic Composition of Cosmic-Ray Helium, Lithium, Beryllium, and Boron up to 1700 MEV per Atomic Mass Unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Measurement of the Isotopic Composition of Cosmic-Ray Helium, Lithium, Beryllium, and Boron up to 1700 MEV per Atomic Mass Unit will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1127212