Table 2
Isotopic Fractions Measured with the
High Energy Cosmic Ray Experiment on ISEE-3

Ratio    Value  Uncertainty     Ref.

Be7 /Be  0.546  (+0.029,-0.029)  a 
Be9 /Be  0.390  (+0.029,-0.029)  a 
Be10/Be  0.064  (+0.015,-0.015)  a 

 B10/B   0.283  (+0.011,-0.008)  b 
 B11/B   0.717  (+0.008,-0.011)  b 

 N14/N   0.447  (+0.011,-0.010)  b 
 N15/N   0.553  (+0.010,-0.011)  b 

 S32/S   0.65   (+0.04,-0.04)    c 
 S33/S   0.13   (+0.03,-0.03)    c 
 S34/S   0.21   (+0.03,-0.03)    c 
 S36/S  <0.02                    c 

Cl35/Cl  0.60   (+0.07,-0.07)    c 
Cl36/Cl  0.13   (+0.07,-0.07)    c 
Cl37/Cl  0.27   (+0.07,-0.07)    c 

Ar36/Ar  0.36   (+0.06,-0.06)    c 
Ar37/Ar  0.23   (+0.06,-0.06)    c 
Ar38/Ar  0.37   (+0.06,-0.06)    c 
Ar40/Ar  0.034  (+0.024,-0.017)  c 

 K39/K   0.48   (+0.06,-0.06)    c 
 K40/K   0.25   (+0.07,-0.07)    c 
 K41/K   0.27   (+0.06,-0.06)    c 

Ca40/Ca  0.27   (+0.04,-0.04)    c 
Ca41/Ca  0.12   (+0.03,-0.03)    c 
Ca42/Ca  0.14   (+0.03,-0.03)    c 
Ca43/Ca  0.23   (+0.04,-0.04)    c 
Ca44/Ca  0.24   (+0.04,-0.04)    c 
Ca46/Ca <0.012                   c 

Ti44/Ti  0.015  (+0.013,-0.008)  d
Ti46/Ti  0.240  (+0.040,-0.039)  d
Ti47/Ti  0.273  (+0.054,-0.057)  d
Ti48/Ti  0.376  (+0.061,-0.054)  d
Ti49/Ti <0.066                   d
Ti50/Ti  0.063  (+0.026,-0.021)  d

 V49/V   0.391  (+0.074,-0.073)  d
 V50/V   0.359  (+0.092,-0.088)  d
 V51/V   0.250  (+0.073,-0.066)  d

Cr50/Cr  0.206  (+0.053,-0.042)  d
Cr51/Cr  0.218  (+0.057,-0.056)  d
Cr52/Cr  0.458  (+0.055,-0.055)  d
Cr53/Cr  0.089  (+0.040,-0.036)  d
Cr54/Cr <0.052                   d

Mn53/Mn  0.421  (+0.057,-0.057)  d
Mn54/Mn <0.095                   d
Mn55/Mn  0.538  (+0.058,-0.059)  d

Fe54/Fe  0.069  (+0.013,-0.012)  d
Fe55/Fe <0.063                   d
Fe56/Fe  0.815  (+0.024,-0.025)  d
Fe57/Fe <0.071                   d
Fe58/Fe <0.029                   d

Co57/Co  0.32   (+0.25,-0.14)    d
Co59/Co  0.68   (+0.14,-0.26)    d

Ni58/Ni  0.408  (+0.095,-0.092)  d
Ni59/Ni <0.20                    d
Ni60/Ni  0.447  (+0.118,-0.115)  d
Ni61/Ni <0.073                   d
Ni62/Ni <0.10                    d

References

 a "A Cosmic-Ray Age Based on the Abundance of $^{10$Be", M. E.
   Wiedenbeck and D. E. Greiner, Ap. J. (Letters), 239, L139
   (1980).
 b "The Isotopic Composition of Cosmic Ray Boron and Nitrogen",
   K. E.  Krombel and M. E. Wiedenbeck, Ap. J., 328, 940 (1988).
 c "Composition Measurements from ISEE-3: Fluorine through Calcium",
   R. A. Leske and M. E. Wiedenbeck, 23rd Internat. Cosmic Ray Conf.
   (Calgary), submitted 1993.
 d "The Elemental and Isotopic Composition of Galactic Cosmic-Ray
   Nuclei from Scandium through Nickel", R. A. Leske, Ap. J., 405,
   567 (1993).