  The level-resolved radiative recombination (RR) rate coefficients for H-like
to Na-like ions from H (Z = 1) up to and including Zn (Z = 30) are studied
here. For H-like ions, the quantum-mechanical exact photoionization cross
sections for nonrelativistic hydrogenic systems are used to calculate the RR
rate coefficients under the principle of detailed balance, while for He-like to
Na-like ions, the archival data on ADAS are adopted. Parameterizations are made
for the direct capture rates in a wide temperature range. The fitting
accuracies are better than 5% for about 99% of the 30, 000 levels considered
here. The 1% exceptions include levels from low- charged many-electron ions,
and/or high-shell (n>=4) levels are less important in terms of interpreting
X-ray emitting astrophysical plasmas. The RR data will be incorporated into the
high-resolution spectral analysis package SPEX.
