The detector New Instrument for Nuclear Analysis (NINA) aboard the satellite Resurs-01-N4 detected hydrogen and helium isotopes geomagnetically trapped, while crossing the South Atlantic Anomaly. Deuterium and tritium at L shell < 1.2 were unambiguously recognized. The 3He and 4He power law spectra, reconstructed at L shell = 1.2 and B < 0.22 G, have indices equal to 2.30 ±0.08 in the energy range 12-50 MeV/nucleon and 3.4 ± 0.2 in 10-30 MeV/nucleon, respectively. The measured 3He/4He ratio and the reconstructed deuterium profile as a function of L shell bring one to the conclusion that the main source of radiation belt light isotopes at Resurs altitudes (∼800 km) and for energy greater than 10 MeV/nucleon is the interaction of trapped protons with residual atmospheric helium.
Geomagnetically trapped light isotopes observed with the detector NINA / Bakaldin A., Galper A., Koldashov S., Korotkov M., Leonov A., Mikhailov V., Murashov A., Voronov S., Bidoli V., Casolino M., De Pascale M., Furano G., Iannucci A., Morselli A., Picozza P., Sparvoli R., Boezio M., Bonvicini V., Cirami R., Vacchi A., et al.. - In: JOURNAL OF GEOPHYSICAL RESEARCH. - ISSN 0148-0227. - STAMPA. - 107:(2002), pp. 1-8. [10.1029/2001JA900172]
Geomagnetically trapped light isotopes observed with the detector NINA
ADRIANI, OSCAR;PAPINI, PAOLO;SPILLANTINI, PIERO;STRAULINO, SAMUELE;VANNUCCINI, ELENA;CASTELLINI, GUIDO
2002
Abstract
The detector New Instrument for Nuclear Analysis (NINA) aboard the satellite Resurs-01-N4 detected hydrogen and helium isotopes geomagnetically trapped, while crossing the South Atlantic Anomaly. Deuterium and tritium at L shell < 1.2 were unambiguously recognized. The 3He and 4He power law spectra, reconstructed at L shell = 1.2 and B < 0.22 G, have indices equal to 2.30 ±0.08 in the energy range 12-50 MeV/nucleon and 3.4 ± 0.2 in 10-30 MeV/nucleon, respectively. The measured 3He/4He ratio and the reconstructed deuterium profile as a function of L shell bring one to the conclusion that the main source of radiation belt light isotopes at Resurs altitudes (∼800 km) and for energy greater than 10 MeV/nucleon is the interaction of trapped protons with residual atmospheric helium.
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
