K . – L . Kratz

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The recent monitoring of drug residues in the aquatic environment has gained much interest as many pharmaceutical compounds can frequently be found in sewage treatment plant (STP) effluents and river water at concentrations up to several microgram/l. This article describes the analysis of various water samples for 18 antibiotic substances, from the classes(More)
For the determination of 18 antibiotics in water samples down to the lower ng/l range, an analytical multi method is presented. The analytes belong to different groups of antibiotics such as penicillins, tetracyclines, sulfonamides and macrolid antibiotics. Samples were enriched using a universal freeze-drying procedure or a solid-phase extraction(More)
Rapid neutron-capture (i.e., r-process) nucleosynthesis calculations, employing internally consistent and physically realistic nuclear physics input (QRPA β-decay properties and the recent ETFSI-Q nuclear mass model), have been performed. These theoretical computations assume the classical waiting-point approximation of (n,γ) ← (γ,n) equilibrium. The(More)
We report the first confirmation of the predicted inversion between the pi2p3/2 and pi1f5/2 nuclear states in the nu(g)9/2 midshell. This was achieved at the ISOLDE facility, by using a combination of in-source laser spectroscopy and collinear laser spectroscopy on the ground states of 71,73,75Cu, which measured the nuclear spin and magnetic moments. The(More)
The neutron long counter NERO was built at the National Superconducting Cyclotron Laboratory (NSCL), Michigan State University, for measuring b delayed neutron-emission probabilities. The detector was designed to work in conjunction with a b delay implantation station, so that b decays and b delayed neutrons emitted from implanted nuclei can be measured(More)
M. Hannawald, K.-L. Kratz,* B. Pfeiffer, W. B. Walters, V. N. Fedoseyev, V. I. Mishin, W. F. Mueller, H. Schatz, J. Van Roosbroeck, U. Köster, V. Sebastian, H. L. Ravn, and the ISOLDE Collaboration Institut für Kernchemie, Universität Mainz, D-55128 Mainz, Germany Department of Chemistry, University of Maryland, College Park, Maryland 20742 Institute of(More)
The prediction of cross sections for nuclei far off stability is crucial in the field of nuclear astrophysics. In recent calculations the nuclear level density – as an important ingredient to the statistical model (Hauser-Feshbach) – has shown the highest uncertainties. We present a global parametrization of nuclear level densities based on the back-shifted(More)
In an attempt to constrain the astrophysical conditions for the nucleosynthesis of the classical r-process elements beyond Fe, we have performed large-scale dynamical network calculations within the model of an adiabatically expanding highentropy wind (HEW) of type II supernovae (SN II). A superposition of several entropy-components (S) with model-inherent(More)
A. WÖHR, W.B. WALTERS, K.-L. KRATZ, O. ARNDT, B.A. BROWN, I. DILLMANN, D. FEDOROV, V. FEDOSEYEV, L. FRAILE, P. HOFF, U. KÖSTER, A.N. OSTROWSKI, B. PFEIFFER, H.L. RAVN, M.D. SELIVERSTOV, D. SEWERYNIAK, J. SHERGUR B. TRUETT AND THE ISOLDE COLLABORATION 5 Department of Chemistry, University of Maryland, College Park, USA Institut für Kernchemie, Universität(More)
In the frame of our systematic investigations of nuclear structure properties of neutron-rich A'100 nuclei at the isotope separator ISOLDE at CERN, an isomeric level at 1619 keV with the surprisingly long t1=2 = 85 ns was observed in Sr [1, 2]. In analogy to a K =4 rotational band observed in the isotone Zr [3], the half-life could be interpreted as a K = 4(More)