Solar Energetic Particle 22Ne/20Ne Ratios from ACE/SIS

~15-72 MeV/nucleon


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Large SEPs   for year 2005

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
2005  250.66600  253.50000  0.06359  0.00260  
2005  233.75000  240.33299  0.07916  0.00465  
2005  194.25000  202.33299  0.08920  0.00453  
2005  19.75000  24.75000  0.09084  0.00332  
2005  15.25000  17.50000  0.07743  0.00405  
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Large SEPs   for year 2004

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
2004  311.75000  326.75000  0.07097  0.00322  
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Large SEPs   for year 2003

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
2003  308.89999  313.50000  0.07614  0.00508  
2003  306.70001  308.20001*  0.08152  0.00619  
2003  302.91666  306.00000*  0.10681  0.00459  
2003  301.45834  302.91666*  0.08167  0.00728  
2003  299.70834  301.45834  0.09767  0.00696  
2003  148.00000  150.50000  0.09787  0.01096  
* indicates period near peak of event (when isotopic resolution degrades) was omitted top


Large SEPs   for year 2002

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
2002  236.00000  240.00000  0.08601  0.01002  
2002  234.00000  235.75000  0.18927  0.03290  
2002  202.50000  213.00000  0.05770  0.00712  
2002  142.00000  147.50000  0.06476  0.00852  
2002  111.00000  118.00000  0.06574  0.00211  
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Large SEPs   for year 2001

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
2001  364.33331  373.00000  0.06710  0.00714  
2001  360.00000  363.00000  0.08257  0.00599  
2001  326.75000  335.00000*  0.06231  0.00423  
2001  308.66599  315.00000*  0.06445  0.00252  
2001  274.50000  279.00000  0.05301  0.00404  
2001  267.50000  274.50000*  0.06561  0.00294  
2001  228.00000  237.00000  0.06807  0.00396  
2001  127.50000  129.25000  0.09926  0.02203  
2001  108.10000  113.00000  0.09474  0.00927  
2001  105.54166  108.10000  0.11368  0.00836  
2001  100.25000  102.45834  0.09081  0.00432  
2001  92.90000  97.50000  0.11052  0.00317  
2001  88.45834  90.66667  0.12441  0.01086  
2001  28.70000  31.50000  0.12759  0.03270  
* indicates period near peak of event (when isotopic resolution degrades) was omitted top


Large SEPs   for year 2000

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
2000  330.50000  335.00000  0.07363  0.00572  
2000  315.39999  329.00000*  0.06750  0.00709  
2000  290.33331  294.00000  0.13523  0.02327  
2000  256.50000  260.25000  0.07819  0.01624  
2000  198.00000  201.00000*  0.07256  0.00374  
2000  162.70000  164.50000  0.07257  0.03961  
2000  95.70000  98.00000  0.07899  0.02120  
* indicates period near peak of event (when isotopic resolution degrades) was omitted top


Large SEPs   for year 1999

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
1999  155.30000  157.50000  0.07270  0.01233  
1999  152.85001  155.10001  0.10183  0.01874  
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Large SEPs   for year 1998

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
1998  318.20834  321.00000  0.13645  0.00641  
1998  273.50000  275.50000  0.09572  0.00588  
1998  236.91666  240.00000  0.04987  0.00407  
1998  129.20000  130.80000  0.06700  0.01581  
1998  126.33330  127.50000  0.18627  0.01870  
1998  122.50000  124.50000  0.17326  0.01565  
1998  110.50000  114.00000  0.05260  0.00184  
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Large SEPs   for year 1997

Year  start/
DOY		  end/
DOY		  Ratio
22Ne/20Ne		  +/-  
1997  310.50000  314.00000  0.15862  0.00480  
1997  308.25000  310.00000  0.08169  0.01328  

References

R.A. Leske, R.A. Mewaldt, C.M.S. Cohen, A.C. Cummings, E.C. Stone, M.E. Wiedenbeck, E.R. Christian, and T.T. von Rosenvinge, ``Event-to-event variations in the isotopic composition of neon in solar energetic particle events'', GRL 26, 2693-2696, 1999.

R.A. Leske, R.A. Mewaldt, C.M.S. Cohen, E.R. Christian, A.C. Cummings, P.L. Slocum, E.C. Stone, T.T. von Rosenvinge, and M.E. Wiedenbeck, ``Isotopic Abundances in the Solar Corona as Inferred from ACE Measurements of Solar Energetic Particles'',in Solar and Galactic Composition, edited by R.F. Wimmer-Schweingruber, AIP Conf. Proc. 598, 127-132, 2001.

R.A. Leske, R.A. Mewaldt, C.M.S. Cohen, E.R. Christian, A.C. Cummings, P.L. Slocum, E.C. Stone, T.T. von Rosenvinge, and M.E. Wiedenbeck, ``Mass fractionation in solar energetic particles and the isotopic composition of the corona'', Proc. 27th ICRC (Hamburg), 8, 3124-3127, 2001.

R.A. Leske, R.A. Mewaldt, C.M.S. Cohen, E.R. Christian, A.C. Cummings, P.L. Slocum, E.C. Stone, T.T. von Rosenvinge, and M.E. Wiedenbeck, ``The Coronal Isotopic Composition as Determined Using Solar Energetic Particles'', in Solar Wind 10, edited by M. Velli, AIP Conf. Proc. 679, 616-619, 2003.

R.A. Leske, R.A. Mewaldt, C.M.S. Cohen, A.C. Cummings, E.C. Stone, M.E. Wiedenbeck, and T.T. von Rosenvinge, ``Solar Isotopic Composition as Determined Using Solar Energetic Particles'', Sp. Sci. Rev. 130, 195-205, 2007.

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Last Updated: Tue Dec 4 15:29:13 PST 2007