Conclusions
		ü     First time excited state fraction is measured by         model independent method. ü     Theory and experiment are in good agreement         within the parameter space of a “good” trap. ü     Results are, at most, weakly dependent on other        trap parameters. ü     Three parameter ansatz does not work very well ü     For two parameters: C1 = 0.610, C2 = 0.645 ü     For one parameter :  Is= 9.2 mW/cm2
				Thanks to DOE