The cosmic-ray antiproton flux between 0.62 AND 3.19 GeV measured near solar minimum activity

被引：133

作者：

Boezio, M

Carlson, P

Francke, T

Weber, N

Suffert, M

Hof, M

Menn, W

Simon, M

Stephens, SA

Bellotti, R

Cafagna, F

Castellano, M

Circella, M

DeCataldo, G

DeMarzo, C

Giglietto, N

Spinelli, P

Bocciolini, M

Papini, P

Perego, A

Piccardi, S

Spillantini, P

Basini, G

Ricci, M

Codino, A

Finetti, N

Grimani, C

Candusso, M

Casolino, M

DePascale, MP

Morselli, A

Picozza, P

Sparvoli, R

Barbiellini, G

Bravar, U

Schiavon, P

Vacchi, A

Zampa, N

Mitchell, JW

Ormes, JF

Streitmatter, RE

Golden, RL

Stochaj, SJ

机构：

[1] CTR RECH NUCL, F-67037 STRASBOURG, FRANCE

[2] UNIV GESAMTHSCH SIEGEN, D-57068 SIEGEN, GERMANY

[3] TATA INST FUNDAMENTAL RES, BOMBAY 400005, MAHARASHTRA, INDIA

[4] UNIV BARI, DIPARTIMENTO FIS, I-70126 BARI, ITALY

[5] IST NAZL FIS NUCL, I-70126 BARI, ITALY

[6] UNIV FLORENCE, DIPARTIMENTO FIS, I-50125 FLORENCE, ITALY

[7] IST NAZL FIS NUCL, I-50125 FLORENCE, ITALY

[8] IST NAZL FIS NUCL, LAB NAZL FRASCATI, I-00044 FRASCATI, ITALY

[9] UNIV PERUGIA, DIPARTIMENTO FIS, I-06100 PERUGIA, ITALY

[10] IST NAZL FIS NUCL, I-06100 PERUGIA, ITALY

[11] UNIV ROME, DIPARTIMENTO FIS, I-00133 ROME, ITALY

[12] IST NAZL FIS NUCL, I-00133 ROME, ITALY

[13] NASA, GODDARD SPACE FLIGHT CTR, GREENBELT, MD 20771 USA

[14] NEW MEXICO STATE UNIV, LAS CRUCES, NM 88003 USA

[15] UNIV TRIESTE, DIPARTIMENTO FIS, I-34147 TRIESTE, ITALY

[16] IST NAZL FIS NUCL, I-34147 TRIESTE, ITALY

来源：

ASTROPHYSICAL JOURNAL | 1997年 / 487卷 / 01期

关键词：

balloons; cosmic rays; elementary particles; sun; activity;

D O I：

10.1086/304593

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report on the absolute antiproton flux and the antiproton to proton ratio in the energy range 0.62-3.19 GeV at the top of the atmosphere, measured by the balloon-borne experiment CAPRICE; flown from Lynn Lake, Manitoba, Canada, on 1994 August 8-9. The experiment used the New Mexico State University WiZard/CAPRICE balloon-borne magnet spectrometer equipped with a solid radiator Ring Imaging Cherenkov (RICH) detector and a silicon-tungsten calorimeter for particle identification. This is the first time a RICH is used together with an imaging calorimeter in a balloon experiment, and it allows antiprotons to be clearly identified over the rigidity range 1.2-4 GV. Nine antiprotons were identified in the energy range 0.62-3.19 GeV at the top of the atmosphere. The data were collected over 18 hr at a mean residual atmosphere of 3.9 g cm(-2). The absolute antiproton flux is consistent with a pure secondary production of antiprotons during the propagation of cosmic rays in the Galaxy.

引用

页码：415 / 423

页数：9

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