#p126: Tb151 half-life from 287 keV using foil 1
#11 data points. Time since irrad (s) vs ln(A_e)
#Chisqw/D.O.F. = 1.258062, (weighted by 1.0/dy^2), fitting mode: 7
  2399.000      6.919      0.130
 11624.000      6.544      0.110
 52768.000      6.240      0.120
 60701.000      6.220      0.140
 79889.000      5.864      0.100
 87269.000      5.928      0.080
 97970.000      5.853      0.080
146679.000      5.217      0.089
164391.000      4.853      0.102
221587.000      4.255      0.129
233210.000      4.072      0.140
& #lsf fit: y = 6.796144 - 0.000011*x
369.0037	6.7921	0.0
299446.4945	3.5144	0.0