Recent observations of low energy cosmic rays have shown
enhanced fluxes of nitrogen and oxygen relative to other
elements in the ~8-30 MeV/nuc energy interval. We have
extended the measurements of lithium through oxygen down
to ~ 4 MeV/nuc with the Caltech Electron/Isotope Spectrometers
on IMP-7 and -8 during solar quiet periods from October
1972 to September 1974. We find no evidence for significant
enhancements of Li, Be, B. or C, which are found to have
energy spectra consistent with those expected from the adiabatic
deceleration of higher energy galactic cosmic rays.
The He, N, and O fluxes are greatly enhanced when compared
to the other elements, with relative abundances of O/He
~ 0.25, O/B ~ 100, and O/C ~ 30 at ~ 5 to 12.5 MeV/nuc
