#p132: Tb153 half-life from 212 keV using foil 7. Beckie quotes chi^2/dof = 0.6
#15 data points. Time since irrad (s) vs ln(A_e)
#Chisqw/D.O.F. = 0.233434, (weighted by 1.0/dy^2), fitting mode: 7
 91803.000      8.165      0.11
 96217.000      8.292      0.10
111223.000      8.181      0.10
154477.000      7.917      0.10
169483.000      7.917      0.10
221564.000      7.645      0.11
244515.000      7.641      0.10
333670.000      7.364      0.10
432535.000      6.976      0.10
544641.000      6.642      0.10
715889.000      6.015      0.10
884489.000      5.438      0.10
1100757.000     4.670      0.11
1276419.000     4.043      0.15
1492686.000     3.321      0.20
& #lsf fit: y = 8.519400 - 3.49284e-06*x
0.0000	            8.5194  0.00
1498865.0694	    3.2841  0.00