Published September 1, 1975
| Version v1
Journal article
Isotopic composition of cosmic-ray nitrogen at 1.5 GeV/amu
Creators
- 1. Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637
Description
We have determined the cosmic-ray 15N/(14N+15N) ratio with a detector sensitive to velocities of particles in the penumbra of Earth's magnetic field. Our instrument was flown twice on high-altitude balloons from Palestine, Texas, obtaining an exposure factor of 20 m2 sr h. We measure the fraction of 15N to be 0.45plus-or-minus0.07 at 1.5 GeV/amu consistent with an origin for nitrogen primarily due to spallation in the interstellar medium
Additional details
Identifiers
Publishing Information
- Journal Title
- Physical Review Letters
- Journal Volume
- 35
- Journal Issue
- 9
- Series
- Phys. Rev. Lett.
- Journal Page Range
- 601-604
- ISSN
- 0031-9007
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 7226529
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- COSMIC RADIATION; GEOMAGNETIC FIELD; ISOTOPE RATIO; NITROGEN 14; NITROGEN 15; NUCLEI; VELOCITY
- Descriptors DEC
- IONIZING RADIATIONS; ISOTOPES; LIGHT NUCLEI; MAGNETIC FIELDS; NITROGEN ISOTOPES; ODD-EVEN NUCLEI; ODD-ODD NUCLEI; RADIATIONS; STABLE ISOTOPES
Optional Information
- Notes
- Updated automatically by Metadata and Full-Text Enrichment Agent