You do a recombination experiment in a weakly ionized gas in which the main loss mechanism is recombination.

You do a recombination experiment in a weakly ionized gas in which the main loss mechanism is recombination. You create a plasma of density 1020m-3by a sudden burst of ultraviolet radiation and observe that the density decays to half its initial value in 10 msec. What is the value of the recombination coefficient alpha?