Some basic studies on non-destructive elemental analysis of bulky samples by PGAA

An internal monostandard method for PGAA is proposed for completely non-des tructive analysis of elements in bulky samples by the use of a neutron beam guided out from the reactor. The method is essentially the same as the k(0 ) method except that it corrects for the change of relative gamma-ray count ing efficiencies caused by the absorption and scattering of neutrons and ab sorption of gamma-rays within the sample. Some examples of applications to archaeological samples of earthen wares, bronze mirrors, and to voluminous meteorite samples are demonstrated, and its future application to the in-si tu studies of distribution and metabolism of a certain elements in animals is also explained.