  Motional ground state cooling and internal state preparation are important
elements for quantum logic spectroscopy (QLS), a class of quantum information
processing. Since QLS does not require the high gate fidelities usually
associated with quantum computation and quantum simulation, it is possible to
make simplifying choices in ion species and quantum protocols at the expense of
some fidelity. Here, we report sideband cooling and motional state detection
protocols for $^{138}$Ba$^+$ of sufficient fidelity for QLS without an
extremely narrowband laser or the use of a species with hyperfine structure. We
use the two S$_{1/2}$ Zeeman sublevels of $^{138}$Ba$^+$ to Raman sideband cool
a single ion to the motional ground state. Because of the small Zeeman
splitting, near-resonant Raman sideband cooling of $^{138}$Ba$^+$ requires only
the Doppler cooling lasers and two additional AOMs. Observing the near-resonant
Raman optical pumping fluorescence, we estimate a final average motional
quantum number $\bar{n}\approx0.17$. We additionally employ a second,
far-off-resonant laser driving Raman $\pi$-pulses between the two Zeeman
sublevels to provide motional state detection for QLS and to confirm the
sideband cooling efficiency, measuring a final $\bar{n} = 0.15(6)$.
