Isotopic composition of neon in the galactic cosmic rays: a high resolution measurement

Conference · Fri Jun 01 04:00:00 EDT 1979

OSTI ID:6094584

Greiner, D E; Wiedenbeck, M E; Bieser, F S; Crawford, H J; Heckman, H H; Lindstrom, P J

A measurement of the isotopic composition of galactic cosmic ray neon in the energy range 70 to 260 MeV/amu has been made using the U.C. Berkeley HKH instrument aboard ISEE-3. A combination of high resolution and good statistical accuracy makes possible a precise determination of the local interplanetary neon composition. We find /sup 22/Ne//sup 20/Ne = 0.64 +- 0.07 and /sup 21/Ne//sup 20/Ne < 0.30 in local interplanetary space. These ratios, when interpreted in using standard galactic propagation and solar modulation models, yield cosmic ray source abundances which are inconsistent with a solar-like source composition.

• Research Organization: California Univ., Berkeley (USA). Space Sciences Lab.; California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6094584
• Report Number(s): LBL-8921; CONF-790836-4
• Country of Publication: United States
• Language: English

Related Subjects

640101* -- Astrophysics &amp; Cosmology-- Cosmic Radiation
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
COSMIC NUCLEI
COSMIC RADIATION
DATA
DATA FORMS
ELEMENTS
ENERGY RANGE
EXPERIMENTAL DATA
GEV RANGE
GEV RANGE 01-10
GRAPHS
INFORMATION
INTERPLANETARY SPACE
IONIZING RADIATIONS
ISOTOPE RATIO
NEON
NONMETALS
NUCLEI
NUMERICAL DATA
RADIATIONS
RARE GASES
SPACE