Sensitivities Available by NAA

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Written and developed by Prof. Tor Bjørnstad (IFE/UiO) 

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The sensitivities for NAA are dependent upon the irradiation parameters (i.e., neutron flux, irradiation and decay times), measurement conditions (i.e., measurement time, detector
efficiency), nuclear parameters of the elements being measured (i.e., isotope abundance, neutron cross-section, half-life, and gamma-ray abundance). The accuracy of an individual
NAA determination usually ranges between 1 to 10 percent of the reported value. Table I lists the approximate sensitivities for determination of elements assuming interference free

Table 1. Estimated detection limits for INAA using decay gamma rays. Assuming irradiation in a reactor neutron flux of 1 [math]\cdot[/math]1013 n cm-2 s-1.

Sensitivity 10-12g
Dy, Eu
In, Lu, Mn
Au, Ho, Ir, Re, Sm, W
Ag, Ar, As, Br, Cl, Co, Cs, Cu, Er, Ga, Hf, I, La, Sb, Sc, Se, Ta, Tb, Th, Tm, U, V, Yb
Al, Ba, Cd, Ce, Cr, Hg, Kr, Gd, Ge, Mo, Na, Nd, Ni, Os, Pd, Rb, Rh, Ru, Sr, Te, Zn, Zr
Bi, Ca, K, Mg, P, Pt, Si, Sn, Ti, Tl, Xe, Y
F, Fe, Nb, Ne
Pb, S