  We present new calculations of LiBeB production by accelerated particles with
various compositions and energy spectra ranging from low energies to
relativistic energies, and various ambient medium metallicities ($Z/Z_\odot$).
The observed, essentially constant, Be/Fe ratio as a function of $Z/Z_\odot$
can be best understood if the metallicity of the accelerated particles (high
energy or low energy) does not vary much with $Z/Z_\odot$. This could be
achieved if the particles are accelerated directly from the ejecta of Type II
supernovae (SNII) and not from the interstellar medium. Using the observed
Be/Fe and the fact that most of the Fe at low $Z/Z_\odot$ is from SNII, we
derive the energy content in accelerated particles per SNII (a few times
10$^{50}$ erg). We show that additional $^{11}$B production by neutrinos is
consistent with the available data, allowing a neutrino yield from SNII less
than or equal to the nominal published yields. We further show that the
observed $^6$Li at low $Z/Z_\odot$ suggests that the accelerated particles
responsible for the LiBeB at such $Z/Z_\odot$ are confined to low energies and
have a relatively high He/O abundance.
