Abstract
Transmissions of 14 MeV neutrons for the samples were determined from radioactivities of Dy2O3 targets. Semi-log plots of transmissions against the concentrations fell on straight lines, respectively. From the slope of lines, detection limits and standard deviations were calculated and found to be 5×10-3, 2×10-3, 6×10-4 M and 5.2, 5.2, 4.5%. A plot of the slope against absorption cross sections of the isotopes for thermal neutron also fell on a straight line. The neutron transmission for aqueous solution samples was formulated as
T=I/I0=exp (-1.01×10-21×σabs×C),
where C is the concentration of isotope.
From the results of interference by other elements for the analysis, the permitted concentrations in systems of 10B-Cl and 113Cd-Hg, were 1.5 M of Cl and 0.04 M of Hg, respectively. In systems of 6Li-Na and 113Cd-Zn, the interference was not observed.
