Helium in near Earth orbit

被引：162

作者：

Alcaraz, J ^{[1
]}

Alpat, B

Ambrosi, G

Anderhub, H

Ao, L

Arefiev, A

Azzarello, P

Babucci, E

Baldini, L

Basile, M

Barancourt, D

Barao, F

Barbier, G

Barreira, G

Battiston, R

Becker, R

Becker, U

Bellagamba, L

Béné, P

Berdugo, J

Berges, P

Bertucci, B

Biland, A

Bizzaglia, S

Blasko, S

Boella, G

Boschini, M

Bourquin, M

Brocco, L

Bruni, G

Buenerd, M

Burger, JD

Burger, WJ

Cai, XD

Camps, C

Cannarsa, P

Capell, M

Casadei, D

Casaus, J

Castellini, G

Cecchi, C

Chang, YH

Chen, HF

Chen, HS

Chen, ZG

Chernoplekov, NA

Chiueh, TH

Chuang, YL

Cindolo, F

Commichau, V

机构：

[1] CIEMAT, E-28040 Madrid, Spain

[2] Rhein Westfal TH Aachen, Inst Phys 1, D-52056 Aachen, Germany

[3] Rhein Westfal TH Aachen, Inst Phys 3, D-52056 Aachen, Germany

[4] Lab Annecy Le Vieux Phys Particules, LAPP, F-74941 Annecy Le Vieux, France

[5] Louisiana State Univ, Baton Rouge, LA 70803 USA

[6] Johns Hopkins Univ, Baltimore, MD 21218 USA

[7] Chinese Acad Sci, Ctr Space Sci & Applicat, Beijing 100080, Peoples R China

[8] Chinese Acad Launching Vehicle Technol, CALT, Beijing 100076, Peoples R China

[9] Chinese Acad Sci, Inst Elect Engn, Beijing 100080, Peoples R China

[10] Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China

[11] Univ Bologna, I-40126 Bologna, Italy

[12] Ist Nazl Fis Nucl, SEz Bologna, I-40126 Bologna, Italy

[13] Politech Univ Bucharest, Inst Microtechnol, R-76900 Bucharest, Romania

[14] Univ Bucharest, HEPPG, R-76900 Bucharest, Romania

[15] MIT, Cambridge, MA 02139 USA

[16] Natl Cent Univ, Chungli 32054, Taiwan

[17] LIP, Lab Instrumentacao & Fis Expt Particulas, P-3000 Coimbra, Portugal

[18] Univ Maryland, College Pk, MD 20742 USA

[19] CNR, IROE, I-50125 Florence, Italy

[20] Max Planck Inst Extraterr Phys, D-85740 Garching, Germany

[21] Univ Geneva, CH-1211 Geneva 4, Switzerland

[22] Inst Sci Nucl, F-38026 Grenoble, France

[23] Univ Sci & Technol China, Hefei 230029, Anhui, Peoples R China

[24] Helsinki Univ Technol, FIN-02540 Kylmala, Finland

[25] Inst Super Tecn, P-1096 Lisbon, Portugal

[26] LIP, Lab Instrumentacao & Fis Expt Particulas, P-1000 Lisbon, Portugal

[27] Chung Shan Inst Sci & Technol, Tao Yuan 325, Taiwan

[28] Ist Nazl Fis Nucl, Sez Milano, I-20133 Milan, Italy

[29] IV Kurchatov Atom Energy Inst, Moscow 123182, Russia

[30] Inst Theoret & Expt Phys, Moscow 117259, Russia

[31] Ist Nazl Fis Nucl, Sez Perugia, I-06100 Perugia, Italy

[32] Univ Perugia, I-06100 Perugia, Italy

[33] Acad Sinica, Taipei 11529, Taiwan

[34] Kyungpook Natl Univ, Taegu 702701, South Korea

[35] Univ Turku, FIN-20014 Turku, Finland

[36] ETH Zurich, CH-8093 Zurich, Switzerland

[37] Russian Acad Sci, Inst Nucl Phys, St Petersburg, Russia

来源：

PHYSICS LETTERS B | 2000年 / 494卷 / 3-4期

关键词：

D O I：

10.1016/S0370-2693(00)01193-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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) x 10(-3) (m(2) sec sr)(-1) and more than ninety percent of the helium was determined to be He-3 (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. (C) 2000 Published by Elsevier Science B.V.

引用

页码：193 / 202

页数：10

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