Influence of basis-set size on the X Σ 1 / 2 + 2 , A Π 1 / 2 2 , A Π 3 / 2 2 , and B Σ 1 / 2 + 2 potential-energy curves, A Π 3 / 2 2 vibrational energies, and D 1 and D 2 line shapes of Rb+He

The $X^{2}\mathrm{\ensuremath{\Sigma}}_{1/2}^{+}$, $A^{2}\mathrm{\ensuremath{\Pi}}_{1/2}$, $A^{2}\mathrm{\ensuremath{\Pi}}_{3/2}$, and ${B}^{2}{\mathrm{\ensuremath{\Sigma}}}_{1/2}^{+}$ potential-energy curves for Rb+He are computed at the spin-orbit multireference configuration interaction level of theory using a hierarchy of Gaussian basis sets at the double-zeta (DZ), triple-zeta (TZ), and quadruple-zeta (QZ) levels of valence quality. Counterpoise and Davidson-Silver corrections are employed to remove basis-set superposition error and ameliorate size-consistency error. An extrapolation is performed to obtain a final set of potential-energy curves in the complete basis-set (CBS) limit. This yields four sets of systematically improved $X^{2}\mathrm{\ensuremath{\Sigma}}_{1/2}^{+}$, $A^{2}\mathrm{\ensuremath{\Pi}}_{1/2}$, $A^{2}\mathrm{\ensuremath{\Pi}}_{3/2}$, and ${B}^{2}{\mathrm{\ensuremath{\Sigma}}}_{1/2}^{+}$ potential-energy curves that are used to compute the $A^{2}\mathrm{\ensuremath{\Pi}}_{3/2}$ bound vibrational energies, the position of the ${D}_{2}$ blue satellite peak, and the ${D}_{1}$ and ${D}_{2}$ pressure broadening and shifting coefficients, at the DZ, TZ, QZ, and CBS levels. Results are compared with previous calculations and experimental observation.