  This paper seeks to find an explanation of the galactic cosmic ray B/C ratio
newly measured in cosmic rays between ~10 MeV/nuc and 1 TeV/nuc. Voyager
measurements of this ratio at low energies and AMS-2 measurements at high
energies are used in this study. These measurements both considerably exceed at
both low and high energies the ratio predicted using a simple Leaky Box Model
for propagation of cosmic rays in the galaxy. Between 1-70 GeV/nuc, however,
this same model provides an excellent fit (within +2-3%) to the new AMS-2
measurements using an escape length ~P-0.45. This would imply a diffusion
coefficient ~P0.45, very close to the Kraichian cascade value of 0.50 for the
exponent. Extending this same diffusion dependence to high energies, still in a
LBM, along with a truncation of short path lengths in the galaxy will predict a
B/C ratio of 4.5% at ~800 GeV/nuc which is very close to the AMS-2 measurement
at that energy. This would indicate that the amount of material traversed near
the source in a Nested LBM, for example, is less than about 0.5 g/cm2 at these
energies since this process, with additional matter near the sources, would
increase the B/C ratio. At low energies, however, the B/C ratio of 14% +3% at
~10 MeV/nuc measured by Voyager is more difficult to explain. The same
parameters used in a LBM that fit the high energy B/C measurements predicts a
B/C ratio of only ~4% at 10 MeV/nuc where the path length is about 1.5 g/cm2.
If the cosmic rays have traversed ~10 g/cm2 of material in the galaxy at low
energies the prediction for B/C is still only 8%, which is between 2.0-3.0
sigma below the measurement and its errors.
