RELATIVE COMPOSITION AND ENERGY SPECTRA OF LIGHT NUCLEI IN COSMIC RAYS: RESULTS FROM AMS-01

Journal Article · Sat Nov 20 00:00:00 EST 2010 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/724/1/329· OSTI ID:21471184

Aguilar, M; Alcaraz, J; Berdugo, J ^[1]; Allaby, J ^[2]; Alpat, B; Ambrosi, G; Azzarello, P; Battiston, R ^[3]; Anderhub, H ^[4]; Ao, L ^[5]; Arefiev, A ^[6]; Arruda, L; Barao, F; Barreira, G ^[7]; Basile, M; Bellagamba, L ^[8]; Bartoloni, A ^[9]; Becker, R; Becker, U ^[10]; Bene, P ^[11]

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1. Centro de Investigaciones Energeticas, Medioambientales y Tecnologicas, CIEMAT, E-28040 Madrid (Spain)
2. European Laboratory for Particle Physics, CERN, CH-1211 Geneva 23 (Switzerland)
3. INFN-Sezione di Perugia, I-06100 Perugia (Italy)
4. Eidgenoessische Technische Hochschule, ETH Zuerich, CH-8093 Zuerich (Switzerland)
5. Chinese Academy of Launching Vehicle Technology, CALT, 100076 Beijing (China)
6. Institute of Theoretical and Experimental Physics, ITEP, Moscow 117259 (Russian Federation)
7. Laboratorio de Instrumentacao e Fisica Experimental de Particulas, LIP, P-1000 Lisboa (Portugal)
8. University of Bologna and INFN-Sezione di Bologna, I-40126 Bologna (Italy)
9. INFN-Sezione di Roma, I-00185 Roma (Italy)
10. Massachusetts Institute of Technology, Cambridge, MA 02139 (United States)
11. DPNC, Universite de Geneve, CH-1211 GENEVA 4 (Switzerland)

Measurement of the chemical and isotopic composition of cosmic rays is essential for the precise understanding of their propagation in the galaxy. While the model parameters are mainly determined using the B/C ratio, the study of extended sets of ratios can provide stronger constraints on the propagation models. In this paper, the relative abundances of light-nuclei lithium, beryllium, boron, and carbon are presented. The secondary-to-primary ratios Li/C, Be/C, and B/C have been measured in the kinetic energy range 0.35-45 GeV nucleon{sup -1}. The isotopic ratio {sup 7}Li/{sup 6}Li is also determined in the magnetic rigidity interval 2.5-6.3 GV. The secondary-to-secondary ratios Li/Be, Li/B, and Be/B are also reported. These measurements are based on the data collected by the Alpha Magnetic Spectrometer AMS-01 during the STS-91 space shuttle flight in 1998 June. Our experimental results are in substantial agreement with other measurements, where they exist. We describe our light-nuclei data with a diffusive-reacceleration model. A 10%-15% overproduction of Be is found in the model predictions and can be attributed to uncertainties in the production cross-section data.

• OSTI ID: 21471184
• Journal Information: Astrophysical Journal, Vol. 724, Issue 1; Other Information: DOI: 10.1088/0004-637X/724/1/329; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ABUNDANCE
BERYLLIUM
BORON
CARBON
COSMIC RADIATION
CROSS SECTIONS
ENERGY SPECTRA
GALAXIES
GEV RANGE
ISOTOPE RATIO
KINETIC ENERGY
LITHIUM
LITHIUM 6
LITHIUM 7
MAGNETIC RIGIDITY
MAGNETIC SPECTROMETERS
NUCLEAR REACTIONS
NUCLEOSYNTHESIS
SPACE SHUTTLES
AIRCRAFT
ALKALI METALS
ALKALINE EARTH METALS
DIMENSIONLESS NUMBERS
ELEMENTS
ENERGY
ENERGY RANGE
IONIZING RADIATIONS
ISOTOPES
LIGHT NUCLEI
LITHIUM ISOTOPES
MEASURING INSTRUMENTS
METALS
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
RADIATIONS
SEMIMETALS
SPACE VEHICLES
SPECTRA
SPECTROMETERS
STABLE ISOTOPES
SYNTHESIS
VEHICLES