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Measurements of the Flux of Low-Energy Solar-Flare Positrons

Hurford, G. J. and Mewaldt, R. A. and Stone, E. C. and Vogt, R. E. (1973) Measurements of the Flux of Low-Energy Solar-Flare Positrons. Proceedings of the 13th International Cosmic Ray Conference . pp. 1613-1617.

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We report new upper limits to the flux of solar-flare positrons in the energy range 0.2 - 2 MeV. The observations were made during four solar-particle events in late 1972, with the Caltech Electron/ Isotope Spectrometer on IMP-7. The 0.2 - 2 MeV positron flux is compared directly to the solar-flare electron (0.2 - 2 MeV) and proton (1.2 - 27.5 MeV) fluxes measured in the same detector system. Summing over four solar events, we find e^+/(e^+ + e^-) < 6 x 10^(- 3). Calculated fluxes of solar-flare positrons for these four events are well below our upper limits.

Item Type:Article
Related URLs:
URLURL TypeDescription Technical Reports Server (NTRS)
Mewaldt, R. A.0000-0003-2178-9111
Stone, E. C.0000-0002-2010-5462
Additional Information:© 1973 University of Colorado. Provided by the NASA Astrophysics Data System. This work was supported in part by the National Aeronautics and Space Administration under Contract NAS5-11066 and Grant NGR 05-002-160. One of us (Hurford) received support from the National Research Council of Canada while another (Stone) was an Alfred P. Sloan research fellow during this period. Space Radiation Laboratory SRL ID #: 1973-14.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
NASANGR 05-002-160
National Research Council of Canada (NRCC)UNSPECIFIED
Alfred P. Sloan Research FellowshipUNSPECIFIED
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory1973-14
Record Number:CaltechAUTHORS:20140409-092807362
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44814
Deposited By: SWORD User
Deposited On:10 Apr 2014 21:53
Last Modified:20 Feb 2020 14:33

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