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Interplanetary Deceleration of Solar Cosmic Rays

Murray, S. S. and Stone, E. C. and Vogt, R. E. (1971) Interplanetary Deceleration of Solar Cosmic Rays. Physical Review Letters, 26 (11). pp. 663-666. ISSN 0031-9007. doi:10.1103/PhysRevLett.26.663.

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Observations of solar-flare proton fluxes of low energies (1-10 MeV) during the 7 June 1969 event have been used to study the effects of energy-change processes on particles propagating in interplanetary space. It is found that the proton energies are decreasing with time at a rate which is consistent with an exponential-decay time constant of 210±10 h. Since adiabatic deceleration in a uniform solar wind would result in a faster decay (78±4 h), additional processes such as Fermi acceleration or a more general deceleration process must be considered.

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Stone, E. C.0000-0002-2010-5462
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Additional Information:© 1971 The American Physical Society. Received 25 January 1971. Work supported by the National Aeronautics and Space Administration under Contract No. NAS5-9312 and Grants No. NGR-05-002-160 and No. NGL-05-002-007
Group:Space Radiation Laboratory
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NASANGR 05-002-160
NASANGL 05-002-007
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Space Radiation Laboratory1971-01
Issue or Number:11
Record Number:CaltechAUTHORS:20140408-084159503
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:44726
Deposited By: SWORD User
Deposited On:14 Apr 2014 23:27
Last Modified:10 Nov 2021 16:55

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