  Nuclear transitions are one possible source of axions but past searches were
restricted to specifc transitions. In this manuscript, we propose to extend the
search for axions and axion-like particles to more a complex environment that
would result in a number of correlated observables. By including creation
mechanisms that have their origin in the Carbon-Nitrogen-Oxygen (CNO) cycle, we
show that the search for solar axions should not only be restricted to the
keV-mass region. We discuss limitations, such as the lifetime and the mass,
that create a challenge for an Earth-bound experiments. We show that it is
possible to use the same creation mechanisms as used in solar axions to search
with a comparable rate at nuclear power reactors.
