A Caltech Library Service

Cosmic Ray Antiproton Observations from 0.2 to 3.2 GeV

Labrador, A. W. and Menn, W. and Barbier, L. M. and Christian, E. R. and Davis, A. J. and Golden, R. L. and Hof, M. and Krombel, K. E. and Mewaldt, R. A. and Mitchell, J. W. and Ormes, J. F. and Reimer, O. and Schindler, S. M. and Simon, M. and Stochaj, S. J. and Streitmatter, R. E. and Rasmussen, I. L. and Webber, W. R. (1995) Cosmic Ray Antiproton Observations from 0.2 to 3.2 GeV. In: Proceedings of the 24th International Cosmic Ray Conference. Vol.3. International Union of Pure and Applied Physics , pp. 64-67.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


The Isotope Matter Antimatter Experiment (IMAX) has detected 16 antiprotons, in the energy range from 0.2 to 3.2 GeV. This result provides significant improvement in statistical accuracy over previous cosmic ray antiproton measurements in the same energy range. This measurement has been corrected for instrumental and atmospheric losses, yielding top-of-the-atmosphere antiproton to proton ratios in three energy intervals. These results are consistent with recent theoretical predictions in which antiprotons are produced as secondary cosmic rays and are transported through the galaxy according to the standard Leaky Box model.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Labrador, A. W.0000-0001-9178-5349
Christian, E. R.0000-0003-2134-3937
Hof, M.0000-0003-2884-3037
Mewaldt, R. A.0000-0003-2178-9111
Additional Information:© IUPAP. Provided by the NASA Astrophysics Data System. This research was supported in part by NASA grant NAGW-1919. One of us (AWL) thanks the NASA Graduate Student Researchers Program for its support. The IMAX team is grateful to the NSBF for a successful balloon flight.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASA Graduate Student Researchers ProgramUNSPECIFIED
Other Numbering System:
Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1995-25
Record Number:CaltechAUTHORS:20140617-162911825
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:46316
Deposited By: Deborah Miles
Deposited On:07 Jul 2014 05:55
Last Modified:09 Mar 2020 13:18

Repository Staff Only: item control page