Aside from empirical formulas, the radiative-recombination cross secti
on and coefficient are usually given in tabulated forms instead of ana
lytic formulas. Here, we give analytic expressions in the form of expa
nsions for the recombination cross section as a function of the electr
on energy E for low E, and for the recombination coefficient as a func
tion of the temperature T for low T. The expansion coefficients are co
mbinations of confluent hypergeometric functions, and are tabulated fo
r a large number of the final principal and angular-momentum quantum n
umbers n and l. It is shown that the recombination cross section for a
rbitrary nuclear charge number Z is independent of Z, while the recomb
ination coefficient for T/Z2 much lees than 1. 58 X 10(5) K increases
as Z2. Excellent agreement is found with the published tabulated value
s.