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Heliospheric Transport of Neutron-Decay Protons

Chollet, E. E. and Mewaldt, R. A. (2012) Heliospheric Transport of Neutron-Decay Protons. Solar Physics, 281 (1). pp. 449-459. ISSN 0038-0938. doi:10.1007/s11207-012-0082-x.

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We report on new simulations of the transport of energetic protons originating from the decay of energetic neutrons produced in solar flares. Because the neutrons are fast-moving but insensitive to the solar wind magnetic field, the decay protons are produced over a wide region of space, and they should be detectable by current instruments over a broad range of longitudes for many hours after a sufficiently large gamma-ray flare. Spacecraft closer to the Sun are expected to see orders-of-magnitude higher intensities than those at the Earth-Sun distance. The current solar cycle should present an excellent opportunity to observe neutron-decay protons with multiple spacecraft over different heliographic longitudes and distances from the Sun.

Item Type:Article
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Mewaldt, R. A.0000-0003-2178-9111
Additional Information:© 2012 Springer Science+Business Media B.V. Received: 13 January 2012; Accepted: 17 July 2012; Published online: 21 August 2012. This work was supported by NASA under grants NNX08AI11G and NNX11AO75G, and subcontract SA2715-26309 from UC Berkeley under NASA contract NAS5-03131. We appreciate the assistance of R.A. Leske and C.M.S. Cohen, and discussions with R. Murphy. We also thank the anonymous reviewer for a number of helpful comments and suggestions.
Group:Space Radiation Laboratory
Funding AgencyGrant Number
Subject Keywords:Flares, energetic particles; Energetic particles, neutrons; Energetic particles, protons; Energetic particles, propagation
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Other Numbering System NameOther Numbering System ID
Space Radiation Laboratory2012-11
Issue or Number:1
Record Number:CaltechAUTHORS:20120827-074458928
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Official Citation:Chollet, E.E. & Mewaldt, R.A. Sol Phys (2012) 281: 449.
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:33540
Deposited By: Tony Diaz
Deposited On:05 Sep 2012 21:33
Last Modified:09 Nov 2021 21:35

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