Massenspektren von Alkoxistibanen

Mass Spectra of Alkoxistibanes The mass spectra of the methoxistibanes Sb(OMe)₃ ( 1 ), ClSb(OMe)₂ ( 2 ) and Cl₂SbOMe ( 3 ) and of d₉-triethoxistibane ( 4 ) are measured at 20 and 70 eV. The fragmentation processes as well as the fragmentation mechanisms which explaines the formation of Sb? H fragments are discussed.     

Extended x-ray absorption fine structure studies of oriented single crystals

Linearly polarized synchrotron radiation is used to study the orientation dependence of the Extended X-ray Absorption Fine Structure (EXAFS) spectrum of single crystal zinc. The spectrum some 5–1200 eV above the K photoabsorption threshold is found to be markedly anisotropic, as would be expected from the established formalism generalized to crystals of lower than cubic symmetry. Zinc thus provides a prototype for molecular crystals of low symmetry where one wishes to study particular bond directions.     

Energy measurement at the Darmstadt unilac accelerator

The kinetic energy of⁸⁶Kr ions accelerated by UNILAC (GSI-Darmstadt) was measured using the recoil proton technique. A good agreement was found with the energy values obtained by the time-of-flight technique currently used at UNILAC.     

Charged particle spectra in16O induced nuclear collisions at the CERN SPS

Charged particle multiplicity distributions and pseudo-rapidity density distributions from¹⁶O induced nuclear collisions at 200 and 60A GeV are presented. The data were taken, using a minimumbias trigger, with the WA80 set-up at the CERN SPS. In this presentation we focus on how the yield of charged particles depends on the projectile energy, the mass number of the target nucleus and the energy measured in a uranium-plastic sampling calorimeter covering angles close to zero degrees. The data are compared to simulations from the event generator FRITIOF.     

Narrow baryonium states in QCD

The unconventional states of qqq?q?, qq? and pure gluon type, appearing in BB? dual diagrams with nonplanar baryons are discussed, treating their interpolating fields in a confinement approach to QCD due to Migdal. The mass spectrum is given to lowest order and the quantum numbers are discussed. It is argued that some of the resonances should have narrow width and hence could be identified with the narrow resonances in pp? scattering.     

Lepton pair production in two-dimensional QCD

Large q² lepton pair production is calculated in leading order in 1/N_c in two-dimensional quantum chromodynamics (QCD). From this confinement model the (Drell-Yan) parton model result is recovered.