Measurements of heavy elements and isotopes in small solar energetic particle events

被引：0

作者：

Slocum, PL ^{[1
]}

Christian, ER ^{[1
]}

Cohen, CMS ^{[1
]}

Cummings, AC ^{[1
]}

Leske, RA ^{[1
]}

Mewaldt, RA ^{[1
]}

Stone, EC ^{[1
]}

von Rosenvinge, TT ^{[1
]}

Wiedenbeck, ME ^{[1
]}

机构：

[1] CALTECH, Jet Prop Lab, Pasadena, CA 91125 USA

来源：

SOLAR AND GALACTIC COMPOSITION | 2001年 / 598卷

关键词：

D O I：

暂无

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using the Solar Isotope Spectrometer on the Advanced Composition Explorer, we have examined the similar to10-20 MeV/nucleon elemental and isotopic composition of heavy (Zgreater than or equal to6) energetic nuclei accelerated in 30 small solar energetic particle (SEP) events which occurred between 31 March 1998 and 2 January 2001. We have measured the average heavy element content, the Ne-22/Ne-20 ratio, and the Mg-26/Mg-24 ratio in these events, and find good agreement with past studies. We have categorized the events according to their He-3/He-4 ratios, and find significant enhancements in the neutron-rich heavy isotopes of Ne and Mg in the combined He-3-rich data set: Ne-22/Ne-20=0.17+/-0.05 and Mg-26/Mg-24=0.25+/-0.05. We discuss the implications of these measurements for the acceleration of energetic nuclei in SEP events.

引用

页码：177 / 182

页数：6

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