R.N. West
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View article: Electron momentum density in yttrium
Electron momentum density in yttrium Open
A simultaneous analysis of high-resolution directional Compton profiles and\ntwo-dimensional angular correlation of positron annihilation experimental data\nhas been performed by studying both a directional anisotropy of measured\nspectra …
View article: Reconstruction of densities from Compton profiles with applying Jacobi polynomials
Reconstruction of densities from Compton profiles with applying Jacobi polynomials Open
The advent of synchrotron sources has led to an increasing availability of high resolution Compton Profiles J(pz) and a consequent renewed interest in the reconstruction of the corresponding full momentum densities rho(p). We present resul…
View article: On the reliability of various enhancement theories for a description of electron-positron densities in metals
On the reliability of various enhancement theories for a description of electron-positron densities in metals Open
Four theoretical approaches to calculate momentum densities of electron-positron annihilation pairs (MDAP) in crystalline solids are confronted with 3D densities reconstructed from two-dimensional angular correlation (2D-ACAR) data for cop…
View article: Fermi surface of yttrium
Fermi surface of yttrium Open
Electron-positron momentum densities in Y, reconstructed from two-dimensional angular correlation of annihilation radiation spectra, are compared with the theoretical predictions of fully-relativistic augmented plane-wave calculations. Kno…
View article: Reconstruction of Densities from Compton Profiles with Applying Jacobi Polynomials
Reconstruction of Densities from Compton Profiles with Applying Jacobi Polynomials Open
The advent of synchrotron sources has led to an increasing availability of high resolution Compton profiles J(pz ) and a consequent renewed interest in the reconstruction of the corresponding full momentum densities p(p).We present results…
View article: Fermi surface of the colossal magnetoresistance perovskite La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub>
Fermi surface of the colossal magnetoresistance perovskite La<sub>0.7</sub>Sr<sub>0.3</sub>MnO<sub>3</sub> Open
Materials that exhibit colossal magnetoresistance (CMR) are currently the\nfocus of an intense research effort, driven by the technological applications\nthat their sensitivity lends them to. Using the angular correlation of photons\nfrom …
View article: 2D Angular Correlation of Annihilation Radiation: Current Trends and Future Possibilities
2D Angular Correlation of Annihilation Radiation: Current Trends and Future Possibilities Open
Recent improvements in two-dimensional angular correlation measurement and analysis techniques have greatly increased the power of the method to image the Fermi surfaces of electronically complex systems.That, and the further and dramatic …
View article: Direct, experimental evidence of the Fermi surface in YBa sub 2 Cu sub 3 O sub 7-x
Direct, experimental evidence of the Fermi surface in YBa sub 2 Cu sub 3 O sub 7-x Open
Hydrolysis of ATP bound to DnaA protein by its intrinsic ATPase activity negatively controls chromosomal DNA replication in Escherichia coli. We developed a new in vitro assay system for ATP hydrolysis, which makes feasible a search for fa…
View article: Electronic structure studies of high-T/sub c/ perovskites and related materials
Electronic structure studies of high-T/sub c/ perovskites and related materials Open
We have performed 2D-ACPAR measurements on La/sub 2/CuO/sub 4/ and NiO. The ACPAR distributions were very isotropic, with small anisotropic deviations on the order of 10% of the total counts. It was not possible to clearly discern a Fermi …