Velocity map imaging inside an electrostatic quadrupole guide is demonstrated. By switching the voltages that are applied to the rods, the quadrupole can be used for guiding Stark decelerated molecules and for extracting the ions. The extraction field is homogeneous along the axis of the quadrupole, while it defocuses the ions in the direction perpendicular to both the axis of the quadrupole an...

The measurement of the residual betatron coupling via skew quadrupole modulation is a new diagnostics technique that has been developed and tested at the Relativistic Heavy Ion Collider (RHIC) as a promising method for the linear decoupling on the ramp. By modulating the strengths of different skew quadrupole families the two eigentunes are precisely measured with the phase lock loop system. Th...

Compact objects in general relativity approximately move along geodesics of spacetime. It is shown that the corrections to geodesic motion due to spin (dipole), quadrupole, and higher multipoles can be modeled by an extension of the point mass action. The quadrupole contributions are discussed in detail for astrophysical objects like neutron stars or black holes. Implications for binaries are a...

In terms of spin coherent states we have investigated topological defects in 2D S = 1 (pseudo)spin quantum system with the bilinear and biquadratic isotropic exchange in the continuum limit. The proper Hamiltonian of the model can be written as bilinear on the generators of SU(3) group (Gell-Mann matrices). Knowledge of such group structure enables us to obtain some new exact analytical results...

Z. Naturforsch. 42b, 573-578 (1987); eingegangen am 8. Januar 1987 Phosphinetetracarbonyliron, Phosphitetetracarbonyliron, IR Spectra, P NMR Spectra, Fe Mössbauer Spectra A series of trigonal bipyramidal Fe(CO)4L complexes has been prepared and characterized by infrared, Fe Mössbauer and P NMR spectroscopy. A linear correlation, with a negative slope, between the CO stretching frequencies and t...

Silver and gold, together with copper, form the transition metal group IB elements in the periodic table and possess very different nuclear magnetic resonance (NMR) spectroscopic properties. While there is only one gold isotope ((197)Au), which has a spin of 3/2 and therefore a quadrupole moment, silver occurs in two isotopic forms ((109)Ag and (109)Au), both of which have a spin 1/2 and simila...

The Mossbauer effect associated with (129)I, (125)Te, and (57)Fe has been applied to investigate structural properties of the axial ligands in ferric-high spin hematoheme-I, hematoheme-Te, and hematoheme-histidine-iodide. The magnitude and sign of the (129)I quadrupole coupling constant (e(2)qQ) and the isomer shift, as deduced from the Mossbauer effect spectra, are consistent with an axial, s-...

We have developed a polarizable water model for classical molecular dynamics simulations of vibrational spectroscopies, which covers from low-frequency intermolecular modes to high-frequency intramolecular vibrational modes. The model utilizes the ab initio derived geometry-dependent multipole moment surfaces to depict the instantaneous charge density of a water molecule. Multipoles up to quadr...

(51)V NMR parameters have been calculated for VOCl(3), the reference compound in (51)V NMR spectroscopy, in order to capture environmental effects in both the neat liquid and the solid state. Using a combination of periodic geometry optimizations and Car-Parrinello molecular dynamics simulations with embedded cluster NMR calculations, we are able to test the ability of current computational app...