Helium in near earth orbit

AMS Collaboration

研究成果: 雜誌貢獻期刊論文同行評審

86 引文 斯高帕斯(Scopus)


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.

頁(從 - 到)193-202
期刊Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
出版狀態已出版 - 30 11月 2000


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