Observations of geomagnetically trapped light isotopes by NINA

Details Observations of geomagnetically trapped light isotopes by NINA Observations of geomagnetically trapped light isotopes by NINA

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm42b0846p&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM42B-0846

Physics

2720 Energetic Particles, Trapped

Scientific paper

The detector NINA, on board of the satellite Resurs-01-N4, observed hydrogen and helium geomagnetically trapped in the period from November 1998 to April 1999. The 3He and 4He power-law spectra reconstructed at L-shell=1.2 have indexes equal to 2.2+/-0.2 in the energy range 12-50 MeV/n, and 3.6+/-0.5 in 10-30 MeV/n respectively. The presence of 2H and 3H isotopes at L-shell less than 1.2 is unambiguously established. The measured ratio 3He/4He, and the shape of the reconstructed deuterium profile as a function of L-shell, bring to the conclusion that the main source of such radiation belt light isotopes is the interaction of trapped protons with residual atmospheric helium.

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