The Cosmic‐Ray Antiproton Flux between 0.62 and 3.19 GeV Measured Near Solar Minimum Activity | Zendy

M. Boezio | Zendy; P. Carlson | Zendy; T. Francke | Zendy; N. Weber | Zendy; M. Suffert | Zendy; M. Hof | Zendy; W. Menn | Zendy; M. Simon | Zendy; S. A. Stephens | Zendy; R. Bellotti | Zendy; F. Cafagna | Zendy; M. Castellano | Zendy; M. Circella | Zendy; G. de Cataldo | Zendy; C. De Marzo | Zendy; N. Giglietto | Zendy; P. Spinelli | Zendy; M. Bocciolini | Zendy; P. Papini | Zendy; A. Perego | Zendy; S. Piccardi | Zendy; П. Спиллантини | Zendy; G. Basini | Zendy; M. Ricci | Zendy; A. Codino | Zendy; N. Finetti | Zendy; C. Grimani | Zendy; M. Candusso | Zendy; M. Casolino | Zendy; M. P. De Pascale | Zendy; A. Morselli | Zendy; P. Picozza | Zendy; R. Sparvoli | Zendy; G. Barbiellini | Zendy; U. Bravar | Zendy; P. Schiavon | Zendy; A. Vacchi | Zendy; N. Zampa | Zendy; J. W. Mitchell | Zendy; J. F. Ormes | Zendy; R. E. Streitmatter | Zendy; R. L. Golden | Zendy; S. J. Stochaj | Zendy

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The Cosmic‐Ray Antiproton Flux between 0.62 and 3.19 GeV Measured Near Solar Minimum Activity

Author(s) -

M. Boezio,

P. Carlson,

T. Francke,

N. Weber,

M. Suffert,

M. Hof,

W. Menn,

M. Simon,

S. A. Stephens,

R. Bellotti,

F. Cafagna,

M. Castellano,

M. Circella,

G. de Cataldo,

C. De Marzo,

N. Giglietto,

P. Spinelli,

M. Bocciolini,

P. Papini,

A. Perego,

S. Piccardi,

П. Спиллантини,

G. Basini,

M. Ricci,

A. Codino,

N. Finetti,

C. Grimani,

M. Candusso,

M. Casolino,

M. P. De Pascale,

A. Morselli,

P. Picozza,

R. Sparvoli,

G. Barbiellini,

U. Bravar,

P. Schiavon,

A. Vacchi,

N. Zampa,

J. W. Mitchell,

J. F. Ormes,

R. E. Streitmatter,

R. L. Golden,

S. J. Stochaj

Publication year - 1997

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/304593

Subject(s) - antiproton , physics , cosmic ray , nuclear physics , cherenkov radiation , pamela detector , calorimeter (particle physics) , astroparticle physics , flux (metallurgy) , astronomy , astrophysics , proton , ultra high energy cosmic ray , detector , optics , materials science , metallurgy

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

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