@article{4dac390d44d7452a9f0b0739fca32222,
title = "Helium in near earth orbit",
abstract = "The helium spectrum from 0.1 to 100 GeV=nucleon was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at altitudes near 380 km. Above the geomagnetic cutoff the spectrum is parameterized by a power law. Below the geomagnetic cutoff a second helium spectrum was observed. In the second helium spectra over the energy range 0.1 to 1:2 GeV=nucleon the flux was measured to be (6.3±0.9)±10-3 (m2 sec sr)-1 and more than ninety percent of the helium was determined to be 3He (at the 90% CL). Tracing helium from the second spectrum shows that about half of the 3He travel for an extended period of time in the geomagnetic field and that they originate from restricted geographic regions similar to protons and positrons.",
author = "{AMS Collaboration} and J. Alcaraz and B. Alpat and G. Ambrosi and H. Anderhub and L. Ao and A. Arefiev and P. Azzarello and E. Babucci and L. Baldini and M. Basile and D. Barancourt and F. Barao and G. Barbier and G. Barreira and R. Battiston and R. Becker and U. Becker and L. Bellagambaj and P. B{\'e}n{\'e} and J. Berdugo and P. Berges and B. Bertucci and A. Bilandag and S. Bizzaglia and S. Blasko and G. Boella and M. Boschini and M. Bourquin and L. Brocco and G. Bruni and M. Buenerd and Burger, {J. D.} and Burger, {W. J.} and Cai, {X. D.} and C. Camps and P. Cannarsaag and M. Capell and D. Casadei and J. Casaus and G. Castellini and C. Cecchi and Chang, {Y. H.} and Chen, {H. F.} and Chen, {H. S.} and Chen, {Z. G.} and Chernoplekov, {N. A.} and Chiueh, {T. H.} and Chuang, {Y. L.} and F. Cindolo and Lee, {S. C.}",
note = "Publisher Copyright: {\textcopyright} 2000 Published by Elsevier Science B.V.",
year = "2000",
month = nov,
day = "30",
doi = "10.1016/S0370-2693(00)01193-X",
language = "???core.languages.en_GB???",
volume = "494",
pages = "193--202",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
number = "3-4",
}