Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. Georgi BontcheV Str. Bl.11, 1113 Sofia, Bulgaria, Anorganisch-Chemisches Institut, UniVersität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany, Département de Chimie, UniVersité de Fribourg, Ch. du Musée 9, CH-1700 Fribourg, Switzerland, and Département de Chimie Physique, UniVersité de GenèVe, G...

Our recent investigations represent an attempt to the self-consistent description of exotic phenomena in neutron–rich A∼100 nuclei [1, 2] within the complex Excited Vampir variational model with symmetry projection before variation using a realistic effective interaction in a large model space. The triple shape coexistence and the shape evolution in the N=58 Sr and Zr isotopes, the shape evolut...

The temperature dependence of the energy centroids and strength distributions for Gamow-Teller (GT) 1+ excitations in several fp-shell nuclei is studied. The quasiparticle random phase approximations (QRPA) is extended to describe GT states at finite temperature. A shift to lower energies of the GT+ strength is found, as compared to values obtained at zero temperature. Typeset using REVTEX ∗Ema...

Beta-decay and muon-capture experiments in nuclei are reviewed. The conserved vector current hypothesis is confirmed through the observed constancy of the vector coupling constant determined from the superallowed Fermi transitions and from the measurement of the weak-magnetism term in mirror Gamow-Teller transitions. The axial-vector and pseudoscalar coupling constants in the nucleon are determ...

We present inelastic neutron scattering results on [email protected]#O3.94 for temperatures T between 4 K and 295 K. We find that this compound is a charge-disordered material, in which both Mn-Mn and Mn-Mn nonlinear chains are formed once the electrons have become localized. Unlike the case for the parent material LiMn2O4, we find that the Jahn-Teller active Mn 31 ions in the Li-doped system are...

Background: Electron-capture reaction rates on medium-heavy nuclei are an important ingredient for modeling the late evolution of stars that become core-collapse or thermonuclear supernovae. The estimation of these rates requires the knowledge of Gamow-Teller strength distributions in the β+ direction. Astrophysical models rely on electron-capture rate tables largely based on theoretical models...

In this work, a new cobalt(III) complex, [Co(HEAC)2]ClO4’”2.5H2O (1), with the HEAC, 2(2-(2-hydroxyethylamino)ethylamino)cyclohexanol, was prepared and identified by elemental analysis, FT-IR and UV-Vis spectroscopy, cyclic voltammetry and single-crystal X-Ray diffraction. The cobalt atom in the crystal structure of 1 has a distorted octahedral geometry by coordination of the four nitrogen and ...

We apply the asymptotic iteration method (AIM) [J. Phys. A: Math. Gen. 36, 11807 (2003)] to solve new classes of second-order homogeneous linear differential equation. In particular, solutions are found for a general class of eigenvalue problems which includes Schrödinger problems with Coulomb, harmonic oscillator, or Pöschl-Teller potentials, as well as the special eigenproblems studied recent...

The laser excited, jet-cooled Ã2E′′ − X̃2E′ electronic spectrum of the silver trimer yields detailed information about its Ãand X̃-state vibronic structure. Following extensive parameter fitting, the absorption and emission spectra are simulated and the bands are assigned. The JahnTeller analysis includes both linear and quadratic coupling terms, considered simultaneously with spin-orbit coupling...

Using the density functional methods, we study electronic and structural properties of stoichiometric phases of tantalum mononitride (TaN). The e phase is found to be most stable, closely followed by the h phase. Interestingly, we find that the cubic d phase of the stoichiometric TaN undergoes a spontaneous distortion into a tetragonal structure. This is attributed to a Jahn–Teller type distort...