Geomagnetically trapped light isotopes observed with the detector NINA

被引：4

作者：

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

Zampa, N

Ambriola, M

Bellotti, R

Cafagna, F

Ciacio, F

Circella, M

De Marzo, C

Adriani, O

Papini, P

Spillantini, P

Straulino, S

Vannuccini, E

Ricci, M

Castellini, G

机构：

[1] Moscow Engn Phys Inst, Moscow 115409, Russia

[2] Univ Roma Tor Vergata, Ist Nazl Fis Nucl, Sez Roma 2, I-00133 Rome, Italy

[3] Univ Trieste, Ist Nazl Fis Nucl, Sez Trieste, I-34147 Trieste, Italy

[4] Univ Bari, Ist Nazl Fis Nucl, Sez Bari, I-70126 Bari, Italy

[5] Univ Florence, Ist Nazl Fis Nucl, Sez Firenze, I-50125 Florence, Italy

[6] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[7] CNR, Ist Ric Onde Elettromagnet, I-50125 Florence, Italy

来源：

JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS | 2002年 / 107卷 / A8期

关键词：

trapped energetic particles; isotopes; silicon detector;

D O I：

10.1029/2001JA900172

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

[1] 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 He-3 and He-4 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 1 and 3.4 +/- 0.2 in 10-30 MeV nucleon(-1), respectively. The measured He-3/He-4 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 (similar to800 km) and for energy greater than 10 MeV nucleon(-1) is the interaction of trapped protons with residual atmospheric helium.

引用

页数：8

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