linguistically inclusive public websites. To that end, the study will consider the State of Texas's translation policy as regards its online presence. Specifically, it will consider translation management, translation practice, and translation beliefs as observed
Trace element partitioning was studied at a pulverized-lignite fired power plant in Texas. Concentrations of 41 elements were determined by neutron activation analysis (NAA) for lignite fuel and combustion effluents collected during 10 consecutive days. Elements studied were grouped into three classes according to their enrichment factors and the relationship between their concentrations and particle size. In general, the concentration enhancement in fly ash and the difference in enhancement between elements placed in different classes are shown to be less significant in this study than for other partitioning studies on higher rank coals.
A Prompt Gamma Activation Analysis (PGAA) facility is being developed at The University of Texas at Austin (UT). The UT-PGAA facility will utilize a focused cold-neutron beam from the Texas Cold Neutron Source (TCNS). the TCNS consists of a cold source cryostat and a curved neutron guide. the use of a guided focused cold-neutron beam will provide a high capture reaction rate and low background. The UT-PGAA facility will be used in the nondestructive determination of B, Cd, Gd and S in biological and environmental samples.
Fast neutron generators are used at Texas A & M University to provide a supply of high energy neutrons for nuclear analytical measurements. A series of neutron activation analysis procedures have been developed for determining various major, minor and trace constituents in a variety of materials. These procedures are primarily developed to compliment our reactor based NAA program, thereby expanding the list of determinable elements to include those difficult or impossible to measure using thermal neutrons. A few typical methods are discussed. The unique implementation of the methodologies at Texas A & M are explained.
Work has been conducted at The University of Texas at Austin (UT) to analyze the detection capabilities of the prompt gamma
activation analysis (PGAA) facility. The PGAA facility utilized the cold neutron beam from the UT Triga reactor. Multiple
background measurements and sample blank measurements were taken so that the various sources of background could be identified
and quantified. Detection limits and background interferences for a number of elements including H, B, Be, Li, and N have
Nuclear Analytical Chemistry at Texas A&M University is based in large part on the facilities of the Center for Chemical Characterization and Analysis and the Nuclear Science Center. This paper describes the capabilities of these two centers for instrumental and fast neutron activation analysis, neutron depth profiling, prompt gamma activation analysis, neutron radiography and the unique features of the large volume irradiation cell and reactor pulsing operation.
For the past two years, a cooperative nuclear forensic investigation program has been in operation in the Nuclear Reactor
Laboratory at the University of Texas at Austin. An essential partner in this program has been the Crime Laboratories of the
Texas Department of Public Safety, Under this program, both routine analyses of typical physical evidence samples and comprehensive
survey analyses of classes of materials with forensic importance have been carried out. Both radioisotope-excited nondispersive
X-ray fluorescence and multielement instrumental neutron activation analyses have been used, the first technique for screening
incoming samples and performing macro-constituent analyses and the second for performing quantitative trace element analyses.
Close coordination of routine analyses with the Crime Laboratories has provided supportive and complementary analyses of physical
trace evidence samples for the preparation of investigative results. Carefully selected survey projects, such as the trace
element characterization of safe platers and shotgun pellets described in this paper, have contributed to the development
of background data available for forensic analysis in other laboratories.
The University of Texas cold-neutron prompt gamma-activation analysis (PGAA) facility is operational at the 1-MW UT TRIGA
research reactor. The UT-PGAA facility utilizes a guided cold neutron beam produced by the Texas Cold Neutron Source. The
cold neutrons are transported to the PGAA chamber via a 6-m long curved neutron guide followed by an 80-cm long converging
neutron guide. A program of testing, optimizing, and calibrating the UT-PGAA facility is currently underway. Preliminary results
for the sensitivities and detection limits of boron, hydrogen, and silicon in semiconductor materials are given.
Instrumental Neutron Activation Analysis (INAA) was used to determine relative manufacturing locales of lead-glazed earthenwares recovered from four Spanish missions in Texas. Two principal clays were distinguished, one containing volcanic ash and one sand. The ceramics characterized by the volcanic ash were believed to have been manufactured in Mexico, while those containing sand were made in Texas. This distinctionis important because it suggests that the Indians at the Texas missions were manufacturing ceramics using Spanish technology such as lead-glazing.