Title: Transition rates and radiative lifetimes of Ca I,
Abstract: We tabulate spontaneous emission rates for all possible 811
electric-dipole-allowed transitions between the 75 lowest-energy states of Ca
I. These involve the $4sns$ ($n=4-8$), $4snp$ ($n=4-7$), $4snd$ ($n=3-6$),
$4snf$ ($n=4-6$), $4p^2$, and $3d4p$ electronic configurations. We compile the
transition rates by carrying out ab initio relativistic calculations using the
combined method of configuration interaction and many-body perturbation theory.
The results are compared to the available literature values. The tabulated
rates can be useful in various applications, such as optimizing laser cooling
in magneto-optical traps, estimating various systematic effects in optical
clocks and evaluating static or dynamic polarizabilities and long-range
atom-atom interaction coefficients and related atomic properties.