Isotopic composition of cosmic-ray boron and nitrogen
Journal Article
·
· Astrophys. J.; (United States)
New measurements of the cosmic-ray boron and nitrogen isotopes at earth and of the elemental abundances of boron, carbon, nitrogen, and oxygen are presented. A region of mutually allowed values for the cosmic-ray nitrogen source ratios is determined, and the cosmic-ray escape mean free path is determined as a function of energy using a leaky box model for cosmic-ray propagation in the Galaxy. Relative to O-16, a N-15 source abundance consistent with solar system composition and a N-14 source abundance which is a factor of about three underabundant relative to the solar value are found. 88 references.
- Research Organization:
- Chicago Univ., IL (USA)
- OSTI ID:
- 7188748
- Journal Information:
- Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 328; ISSN ASJOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
640101* -- Astrophysics & Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
BORON
BORON ISOTOPES
CARBON
CHEMICAL COMPOSITION
COSMIC RADIATION
CROSS SECTIONS
DISTRIBUTION
ELEMENT ABUNDANCE
ELEMENTS
GALACTIC EVOLUTION
IONIZING RADIATIONS
ISOTOPES
MASS DISTRIBUTION
NITROGEN
NITROGEN ISOTOPES
NONMETALS
OXYGEN
RADIATIONS
SEMIMETALS
SOLAR SYSTEM
SPATIAL DISTRIBUTION
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
BORON
BORON ISOTOPES
CARBON
CHEMICAL COMPOSITION
COSMIC RADIATION
CROSS SECTIONS
DISTRIBUTION
ELEMENT ABUNDANCE
ELEMENTS
GALACTIC EVOLUTION
IONIZING RADIATIONS
ISOTOPES
MASS DISTRIBUTION
NITROGEN
NITROGEN ISOTOPES
NONMETALS
OXYGEN
RADIATIONS
SEMIMETALS
SOLAR SYSTEM
SPATIAL DISTRIBUTION