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dc.contributor.authorMason, Glenn M.
dc.contributor.authorDesai, Mihir I.
dc.contributor.authorCohen, Christina M S
dc.contributor.authorMewaldt, Richard A.
dc.contributor.authorStone, Edward C.
dc.contributor.authorDwyer, Joseph R.
dc.date.accessioned2017-02-17T15:51:19Z
dc.date.available2017-02-17T15:51:19Z
dc.date.issued2006-08-10
dc.identifier.citationMason, G. M., Desai, M. I., Cohen, C. M. S., Mewaldt, R. A., Stone, E. C., & Dwyer, J. R. (2006). The role of interplanetary scattering in western hemisphere large solar energetic particle events. Astrophysical Journal, 647(1 II), L65-L68. doi:10.1086/507469en_US
dc.identifier.urihttp://hdl.handle.net/11141/1171
dc.description.abstractUsing high-sensitivity instruments on the ACE spacecraft, we have examined the intensities of O and Fe in 14 large solar energetic particleevents whose parent activity was in the solar western hemisphere. Sampling the intensities at low (∼273 keV nucleonˉ¹) and high (∼12 MeV nucleonˉ¹) energies, we find that at the same kinetic energy per nucleon, the Fe/O ratio decreases with time, as has been reported previously. This behavior is seen in more than 70% of the cases during the rise to maximum intensity and continues in most cases into the decay phase. We find that for most events if we compare the Fe intensity with the O intensity at a higher kinetic energy per nucleon, the two time-intensity profiles are strikingly similar. Examining alternate scenarios that could produce this behavior, we conclude that for events showing this behavior the most likely explanation is that the Fe and O share similar injection profiles near the Sun, and that scattering in the interplanetary medium dominates the profiles observed at 1 AU.en_US
dc.language.isoen_USen_US
dc.rightsThis published article is made available in accordance with the publisher’s policy. It may be subject to U.S. copyright law.en_US
dc.rights.urihttps://aas.org/publications/aas-copyright-policyen_US
dc.titleThe role of interplanetary scattering in western hemisphere large solar energetic particle eventsen_US
dc.typeArticleen_US
dc.identifier.doi10.1086/507469


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