Composition of cosmic-ray nuclei from boron to nickel for 1200 to 2400 MeV per nucleon

Journal Article · Mon Jul 15 00:00:00 EDT 1985 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/163310· OSTI ID:5267158

Dwyer, R; Meyer, P

In a series of high-altitude balloon flights we have measured the relative abundances of cosmic-ray nuclei in the charge range boron through nickel (5< or =Z< or =28) with energies 1200--2400 MeV per nucleon. The instrument is a scintillation and Cerenkov counter telescope with a multiwire proportional chamber hodoscope. Good charge separation (sigmaroughly-equal0.2 charge units at iron) and high statistical accuracy (exposure factor = 38 m/sup 2/sr hr) have been achieved. Implications of these chemical composition measurements for the propagation and path length distribution of cosmic rays as well as the source abundances are discussed.

• Research Organization: Enrico Fermi Institute, University of Chicago
• OSTI ID: 5267158
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 294:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics &amp; Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
CHEMICAL COMPOSITION
CHERENKOV COUNTERS
COSMIC RADIATION
COSMIC RAY PROPAGATION
DATA
DATA ANALYSIS
ELEMENT ABUNDANCE
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 01-10
HODOSCOPES
INFORMATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
NUCLEI
NUMERICAL DATA
ORIGIN
RADIATION DETECTORS
RADIATIONS
RESOLUTION
SCINTILLATION COUNTERS