The accurate and efficient simulation of coupled neutron-photon problems is necessary for several important radiation detection applications. Examples include the detection of nuclear threats concealed in cargo containers and prompt gamma neutron activation analysis for nondestructive determination of elemental composition of unknown samples. In these applications, highresolution gamma-ray spec...

Accepted: October 29, 1985 The problems regarding storage and pre-neutron activation analysis treatment for the elements aluminrun. calcium, vanadium, selenium, copper, iodine, zinc, manganese, and magnesium in a urine matrix are reviewed. The type of collection and storage procedure and pre-neutron activation analysis treatment of urine depend on the specific trace element; that is, its inhere...

Most analytical techniques do not comply with the need for direct trace element analysis of samples exceeding the order of grams. Instead, sub-sampling methods are used to obtain representative sampling of the initial material. The possibilities arising from directly analyzing voluminous samples have been discussed [4]. Instrumental Neutron Activation Analysis (INAA) is a powerful technique, wh...

L. Yang, X.-L. Wang,* C.T. Liu, J.A. Fernandez-Baca, C.L. Fu, J.W. Richardson and D. Shi Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA Department of Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221-0012, USA Department of Materials Science and Engineering, University of Tennessee, Knoxville, TN 37996, USA Intense Pulsed Neutron Source, Argonne Nationa...

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