Isotopic anomalies in the galactic cosmic-ray source

Journal Article · Mon Mar 09 04:00:00 EST 1981 · Phys. Rev. Lett.; (United States)

DOI:https://doi.org/10.1103/PhysRevLett.46.682· OSTI ID:6441081

Wiedenbeck, M E; Greiner, D E

High-resolution (s/sub M/<0.25 amu) observations have been made of the isotopic composition of oxygen, neon, and magnesium in the galactic cosmic rays (approx.100-300 MeV/amu). Derived source abundances shown enhancements of /sup 22/Ne//sup 20/Ne, /sup 25/Mg//sup 24/Mg, and /sup 26/Mg//sup 24/Mg over solar-system values by factors of 4.1/sup +0.8//sub -0.6/, 1.6/sup +0.3//sub -0.2/, and 1.6/sup +0.3//sub -0.2/, respectively. These data demonstrate that the cosmic-ray source is compositionally distinct from the solar system and constrain nucleosynthesis models, several of which are considered.

• Research Organization: University of California Space Sciences Laboratory, Berkeley, California 94720
• OSTI ID: 6441081
• Journal Information: Phys. Rev. Lett.; (United States), Journal Name: Phys. Rev. Lett.; (United States) Vol. 46:10; ISSN PRLTA
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics &amp; Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
ALKALINE EARTH METALS
COSMIC NUCLEI
COSMIC RADIATION
COSMIC RAY SOURCES
DATA
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GASES
INFORMATION
IONIZING RADIATIONS
ISOTOPE RATIO
MAGNESIUM
METALS
NEON
NONMETALS
NUCLEI
NUCLEOSYNTHESIS
NUMERICAL DATA
OXYGEN
RADIATIONS
RARE GASES