//      Isotope         Peak Energy (keV)       Abundance       Half-Life
//      *******         *****************       *********       *********
       


        Co-57           122.1			85.5%		270.9 days
			136.5			10.6%

	Co-60           1332.51                 99.9%           5.27 years
                        1173.23                 99.8%	
		
	Ga-67           93.3			38.6%		3.261 days
			184.6			19.7%
			300.2			16.0%

	Tc-99m          140.5			89.15		6.02 hours

	In-111          171.3			90.2%		2.83 days
			245.4			94.05

	I-123           159.0			83.4%		13.13 hours

	I-125           35.5			6.5%		60.14 days

	I-131           284.3			6.1%		8.04 days
			364.5			81.2%
			637.0			7.3%
	       
        Ba-133          355.86                  62.2%           10.4 years
                        80.01                   32.75%
                        302.71                  18.6%
                        383.7                   8.8%
                        276.29                  7.3%

	Xe-133          81.0			36.7%		5.245 days
	
        Cs-137          661.62                  84.62%          30 years
                        32.19                   5.8%

	Tl-209          117.2			77.0%		2.20 min.
			465.1			96.6%
			1567			99.7%