$\mathrm{<mrow><mtext\; mathvariant="italic">Ab</mtext><mtext> </mtext><mtext\; mathvariant="italic">initio</mtext></mrow>}$ $n\alpha$ scattering using the Efros method

We present the first $\mathit{\text{ab}}\mathit{\text{initio}}$ many-body application of the Efros method for scattering utilizing the harmonic oscillator expansion of the continuum wave function. We select single-channel $n\alpha$ scattering and, using low-lying eigenstates from no-core shell model (NCSM) calculations, we obtain well-converged scattering results that are in reasonable agreement with experiment. The results demonstrate that the Efros method is computationally practical and promising for further $\mathit{\text{ab}}\mathit{\text{initio}}$ many-body studies of nuclear reactions.