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Circular magnetic x-ray dichroism in rare earth compounds

Description: This report discusses the following topics: Circular magnetic x-ray dichroism at the ER L{sub 3} Edge; angular dependence of circular magnetic x-ray dichroism in rare earth compounds: and circular magnetic x-ray dichroism in crystalline and amorphous GDFE{sub 2}.
Date: September 30, 1993
Creator: Jonathan, L.
Partner: UNT Libraries Government Documents Department
open access

Probability of detection models for eddy current NDE methods

Description: The development of probability of detection (POD) models for a variety of nondestructive evaluation (NDE) methods is motivated by a desire to quantify the variability introduced during the process of testing. Sources of variability involved in eddy current methods of NDE include those caused by variations in liftoff, material properties, probe canting angle, scan format, surface roughness and measurement noise. This thesis presents a comprehensive POD model for eddy current NDE. Eddy current me… more
Date: April 30, 1993
Creator: Rajesh, S. N.
Partner: UNT Libraries Government Documents Department
open access

Measurement of tau lepton branching fractions

Description: We present {tau}{sup {minus}} lepton branching fraction measurements based on data from the TPC/Two-Gamma detector at PEP. Using a sample of{tau}{sup {minus}} {yields} {nu}{sub {tau}}K{sup {minus}}{pi}{sup +}{pi}{sup {minus}} events, we examine the resonance structure of the K{sup {minus}}{pi}{sup +}{pi}{sup {minus}} system and obtain the first measurements of branching fractions for {tau}{sup {minus}} {yields} {nu}{sub {tau}}K{sub 1}{sup {minus}}(1270) and {tau}{sup {minus}} {yields} {nu}{sub … more
Date: September 30, 1993
Creator: Nicol, N. A.
Partner: UNT Libraries Government Documents Department
open access

Density functional studies: First principles and semi-emperical calculations of clusters and surfaces

Description: Theoretical electronic structure techniques are used to analyze widely different systems from Si clusters to transition metal solids and surfaces. For the Si clusters, first principles density functional methods are used to investigate Si{sub N} for N=2-8. Goal is to understand the different types of bonding that can occur in such small clusters where the atomic coordination differs substantially from tetrahedral bonding; such uncoordinated structures can test approximate models of Si surfaces.… more
Date: April 30, 1993
Creator: Susan, S.
Partner: UNT Libraries Government Documents Department
open access

Analysis of the application of decontamination technologies to radioactive metal waste minimization using expert systems

Description: Radioactive metal waste makes up a significant portion of the waste currently being sent for disposal. Recovery of this metal as a valuable resource is possible through the use of decontamination technologies. Through the development and use of expert systems a comparison can be made of laser decontamination, a technology currently under development at Ames Laboratory, with currently available decontamination technologies for applicability to the types of metal waste being generated and the eff… more
Date: September 30, 1993
Creator: Bayrakal, S.
Partner: UNT Libraries Government Documents Department
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