Published June 13, 2000 | Version v1
Journal article Metadata-only

Anomalous cosmic ray composition from ACE

Creators

  • 1. California Institute of Technology, Pasadena, California 91125 (United States)

Description

During solar quiet periods, the Solar Isotope Spectrometer (SIS) on the Advanced Composition Explorer (ACE) measures the composition and energy spectra of anomalous cosmic rays (ACRs) with energies >8 MeV/nucleon in interplanetary space at 1 AU. In particular, the spectra of individual isotopes for the ACR elements N, O, and Ne are studied with SIS. Intensity enhancements are found in low energy 18O and 22Ne, with relative abundances of 18O/16O∼0.002 and 22Ne/20Ne∼0.1. The neon abundance ratio appears more similar to that found in the solar wind than in meteorites and is far below that determined for the galactic cosmic ray (GCR) source, indicating that GCRs contain material from sources other than just the local interstellar medium

Additional details

Identifiers

DOI
10.1063/1.1291481;

Publishing Information

Journal Title
AIP Conference Proceedings
Journal Volume
516
Journal Issue
1
Journal Page Range
p. 274-282
ISSN
0094-243X
CODEN
APCPCS

Conference

Title
26. International cosmic ray conference
Acronym
ICRC 1999
Dates
17-25 Aug 1999
Place
Salt Lake City, UT (United States)

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
34069073
Subject category
S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
Resource subtype / Literary indicator
Conference, Numerical Data
Descriptors DEI
COSMIC MUONS; COSMIC NEUTRONS; COSMIC PIONS; COSMIC RADIO SOURCES; ELEMENT ABUNDANCE; ENERGY SPECTRA; EXPERIMENTAL DATA; METEORITES; NEON 22; OXYGEN 18; SOLAR WIND
Descriptors DEC
ABUNDANCE; BARYONS; BOSONS; COSMIC RADIATION; DATA; ELEMENTARY PARTICLES; EVEN-EVEN NUCLEI; FERMIONS; HADRONS; INFORMATION; IONIZING RADIATIONS; ISOTOPES; LEPTONS; LIGHT NUCLEI; MESONS; MUONS; NEON ISOTOPES; NEUTRONS; NUCLEI; NUCLEONS; NUMERICAL DATA; OXYGEN ISOTOPES; PIONS; PSEUDOSCALAR MESONS; RADIATIONS; SECONDARY COSMIC RADIATION; SOLAR ACTIVITY; SPECTRA; STABLE ISOTOPES; STELLAR ACTIVITY; STELLAR WINDS

Optional Information

Notes
(c) 2000 American Institute of Physics.