The dependence of the counting efficiency of Marinelli beakers for environmental samples on the density of the samples.
The effect of the density of the radioactive material packed in a Marinelli beaker on the counting efficiency was studied. It was found that for all densities (0.4-1.7 g/cm(3)) studied the counting efficiency (epsilon) fits the linear log-log dependence on the photon energy (E) above 200 keV, i.e. obeying the equation epsilon=alphaE(beta) (alpha, beta-parameters). It was found that for each photon energy the counting efficiency is linearly dependent on the density (rho) of the matrix. epsilon=a-brho (a, b-parameters). The parameters of the linear dependence are energy dependent (linear log-log dependence), leading to a final equation for the counting efficiency of Marinelli beaker involving both density of the matrix and the photon energy: epsilon=alpha(1) x Ebeta1 - alpha2Ebeta2rho.
Alfassi
Z B
ZB
Ben Gurion University, Nucl. Eng. Department, 84105 Beer Sheva, Israel. alfassi@bgu.ac.il
Lavi
N
N
D004784:Environmental Monitoring / Q000295:instrumentation*; D011848:Radioactive Pollutants / Q000032:analysis*
D011848:Radioactive Pollutants