Relative abundance of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mprescripts /><mml:mrow /><mml:mrow><mml:mn>3</mml:mn></mml:mrow><mml:mrow /><mml:mrow /></mml:mmultiscripts></mml:mrow></mml:math>and<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mmultiscripts><mml:mrow><mml:mi mathvariant="normal">He</mml:mi></mml:mrow><mml:mprescripts /><mml

Hatano, Y.; Fukada, Y.; Saito, Takeshi; Oda, Hiroshi; Yanagita, T.

doi:10.1103/physrevd.52.6219

Cited by 12 publications

(13 citation statements)

References 12 publications

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“…The error bars represent the total errors as discussed in Section 3.3. The figure also shows the existing data between 0.1 and 10 GeV nucleon −1 measured by the balloon-borne experiments BESS (Wang et al 2002), IMAX (Reimer et al 1998), the first flight of SMILI (Beatty et al 1993), Hatano et al (1995), and Webber & Yushak (1983). Among these, our data are the only data collected directly in space.…”

Section: Resultsmentioning

confidence: 98%

Isotopic Composition of Light Nuclei in Cosmic Rays: Results From Ams-01

Aguilar

Alcaraz

Allaby

et al. 2011

ApJ

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Section: Resultsmentioning

confidence: 98%

Isotopic Composition of Light Nuclei in Cosmic Rays: Results From Ams-01

Aguilar

Alcaraz

Allaby

et al. 2011

ApJ

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“…14.ÈBESS 93 isotope Ñux ratio of (a) 2H/1H, (b) 2H/4He, and (c) 3He/4He at the top of atmosphere as a function of kinetic energy per nucleon, compared to other experimental data. The data points are as follows : Ðlled circles : this work ; open squares : IMAX measurements (Reimer et al 1998 ;de Nolfo et al 2000 ; / \ 750 MV) ; Ðlled upwardpointing triangles : SMILI-1 measurements (Beatty et al 1993 ; / \ 1.2 GV) ; open circles : SMILI-2 measurements (Wefel et al 1995a ; / \ 1.5 GV) ; open upward-pointing triangles : MASS measurements (Webber et al 1991 ; / \ 1.4 GV) ; open diamonds : Webber & Yusak (1983 ; / \ 450 MV) ; star : Hatano et al (1995) ; Ðlled downward-pointing triangle : Jordan & Meyer (1984), reanalyzed by Webber, Golden, & Mewaldt (1987 ;/ \ 400 MV) ; open cross : Bogomolov et al (1995). The solid curves represent calculated spectra using the reacceleration model with solar modulation parameter 700 MV.…”

Section: Absolute Flux Of Hydrogen and Heliummentioning

confidence: 99%

Measurement of Cosmic‐Ray Hydrogen and Helium and Their Isotopic Composition with the BESS Experiment

Wang

Seo

Anraku

et al. 2002

ApJ

102

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The cosmic-ray hydrogen and helium spectra have been measured by the Balloon Borne Experiment with a Superconducting Solenoid Spectrometer (BESS), which has been Ñown from Lynn Lake, Manitoba, Canada, annually since 1993. The BESS experiment provides excellent rigidity measurement and precise particle identiÐcation with a large geometric acceptance. We present here the hydrogen and helium nuclei energy spectra from 0.2 to 10 GeV nucleon~1 and their isotopic composition from 0.2 to about 1 GeV nucleon~1 for the Ðrst BESS Ñight. This provides the Ðrst simultaneous measurements of the cosmic-ray secondaries, deuterons, and 3He, with their primaries, protons, and 4He over this energy range in a period of solar minimum. In this paper, we have achieved signiÐcant improvements in data analysis in the following aspects. First, the latest available cross-section data and their parameterizations were utilized in the simulation code developed for this study. Second, a complete simulation was performed for both protons and heavy ions : the d-ray e †ect was properly simulated and showed a large inÑuence on the measurement of heavy ions at high energies. Third, the secondary particle correction, which dominates the systematic uncertainty at low energies for singly charged particles, protons and deuterons, was calculated iteratively with the simultaneously measured primary cosmic-ray spectra. In general, the results of this experiment are consistent with other recent measurements using balloon-borne or satellite experiments, but with better precision. The measured spectra of protons, deuterons, 3He, and 4He and their corresponding ratios are compared with di †erent interstellar/heliospheric propagation calculations, which were derived to Ðt observations of heavy nuclei. The overall good agreement indicates that the propagation history for light cosmic-ray elements, protons, deuterons, and helium nuclei is similar to that of the heavy nuclei. The 2H/1H ratio is sensitive to the propagation models, and our results show a tendency of better agreement with the reacceleration model than the standard leaky-box model.

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“…These data are free from atmospheric background. Other data come from balloon borne experiments [6][7][8][9][10][11].…”

Section: Observationsmentioning

confidence: 99%

“…Right: isotopic ratios 2 He/ 4 He and 3 He/ 3 He. Calculations are shown together with the experimental data[5][6][7][8][9][10][11].…”

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confidence: 99%

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AMS Observations of Light Cosmic Ray Isotopes and Implications for their Production in the Galaxy

Tomassetti¹

2012

Astroparticle, Particle, Space Physics, Radiation Interaction, Detectors and Medical Physics Applications

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Observations of light isotopes in cosmic rays provide information on their origin and propagation in the Galaxy. Using the data collected by AMS-01 in the STS-91 space mission, we compare the measurements on 1 H, 2 H, 3 He and 4 He with calculations for interstellar propagation and solar modulation. These data are described well by a diffusive-reacceleration model with parameters that match the B/C ratio data. Close comparisons are made within the astrophysical constraints provided by the B/C data and within the nuclear uncertainties arising from the production cross sections. Astrophysical uncertainties are expected to be dramatically reduced by future data, but nuclear uncertainties may represent a serious limitation of the model predictions. A diagnostic test for the reliability of the models is given by ratios such as 2 H/ 3 He, 6 Li/ 7 Li or 10 B/ 11 B.

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Relative abundance ofHe3andHe

Cited by 12 publications

References 12 publications

Isotopic Composition of Light Nuclei in Cosmic Rays: Results From Ams-01

Isotopic Composition of Light Nuclei in Cosmic Rays: Results From Ams-01

Measurement of Cosmic‐Ray Hydrogen and Helium and Their Isotopic Composition with the BESS Experiment

AMS Observations of Light Cosmic Ray Isotopes and Implications for their Production in the Galaxy

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