Uranium isotope ratio plotted against the counts per channel for U235. for all the parents in the study. Note effect of low counts and convergence of ratio R. for all points greater than 1000 cps towards a value of R = 135.16; SD 1.45 (n = 14). dotted line shows natural ratio of 137.9.
Alaani et al. Conflict and Health 2011 5:15 doi:10.1186/1752-1505-5-15