A reinvestigation of the radiative lifetimes and the quenching rate constants of single excited rotational states (N,F-j,e/f ) (j=1-3) of the NH(A (3)Pi,v=0) radical has been performed. The quenching species was the parent molecule NH3. The electronically excited NH(A (3)Pi) radicals are generated by first forming ground state NH(X (3)Sigma(-)) in the ArF laser photolysis of NH3; after a delay, NH(X (3)Sigma(-)) is pumped by a dye laser to selected fine structure levels of the A (3)Pi state. Both the radiative lifetimes and quenching rate constants were found to be dependent on the rotational level but not on the spin and Lambda-doublet component. The formation of a blast wave was observed under certain conditions leading to time dependent changes of the number density and temperature in the system. In case of a blast wave, kinetic measurements have to be evaluated with great care.