O ct 1 99 3 The relationship between perturbation theory and direct calculations of rare - earth transition intensities

ar X iv : h ep - p h / 99 10 26 0 v 1 7 O ct 1 99 9 Is Heavy Baryon Approach Necessary ?

On the simple model of interacting massless pseudoscalar and heavy fermion fields it is demonstrated that using appropriately chosen renormalization condition one can respect power counting within the relativistic theory without applying the technique of heavy baryon approach. Explicit calculations are performed for diagrams including two-loops. It is argued that the introduction of the heavy b...

v 1 2 9 O ct 1 99 5 Rare - Earth Nuclei : Radii , Isotope - Shifts and Deformation Properties in the Relativistic Mean Field Theory

2 7 O ct 1 99 9 Photoemission Study of Rare - Earth Ditelluride Compounds ( ReTe 2 : Re = La , Pr , Sm , and Gd )

We studied the electronic structure of rare-earth ditelluride (ReTe2: Re = La, Pr, Sm, and Gd) using photoemission spectroscopy. From the x-ray photoelectron spectroscopy (XPS) study of the 3d core levels of rare-earth elements, we found that all the rare earth elements are trivalent. We have also made theoretical calculations using the Gunnarsson and Schönhammer approximation and multiplet cal...

ابررسانای d- موجی، پادفرومغناطیس و مایع اسپینی در ابررساناهای آلی شبه دوبعدی

  The self-energy-functional approach is a powerful many-body tool to investigate different broken symmetry phases of strongly correlated electron systems. We use the variational cluster perturbation theory (also called the variational cluster approximation) to investigate the interplay between the antiferromagnetism and d-wave superconductivity of κ-(ET)2 X conductors. These compounds are desc...

Relationship between 13C NMR Parameters and Antimalarial activity of Cryptolepine Isosteres

Density functional theory calculations were applied to investigate 13C Chemical Shielding (CS) tensors in cryptolepine (1) and its sulfur (2) and oxygen (3) isosteres. The results showed that the CS of carbon nuclei in these compounds may be divided into three types. First, carbons type α,are those directly bonded to X (X= NH, S, O) and σ 33 shielding component of these carbons are deshield...