THE MEASURMENT OF URANIUM CONCENTRATION INDEFFERENT (13) TYPES OF NATURAL HERB.

Abstract

In this research the uranium concentrations in (13) different types of natural herb
samples had been measured, and to limit the level of contamination with radio
nuclides. The determination of uranium concentration in these samples has been
done by using CR-39 track detector, the nuclear reaction used a source of nuclear
fission fragments is 235U (n,f) obtained by the bombardment of 235U with thermal
neutrons from (Am-Be) neutron source which has a flux of (5000 n cm-2 s-1). The
results obtained show that the concentration of Uranium were calculated by
comparison with standard samples, and varies from 0.235 ppm in (calum) type to
0.552 ppm in (Lazmender) type, all the results obtained are within the international
levels as given by UNSCAR (United Nations Scientific Committee on the Effect of
Atomic Radiation) data.