German centralization strategy during COVID-19: Continuing or interrupting a trend?

In response to the COVID-19 pandemic, many countries applied centralization strategies to the distribution of power between national government and regional/local governments over responsibility for regulatory tasks. As a result, health-policy decision-making competences were shifted from the regional level to the national level (vertical shift of decision-making competences). This centralization trend for the purpose of infection control is evident in Germany.

Dielectric Behavior and Prolate Growth Patterns of Silicon Clusters Si with = 12-30 by Cryogenic Electric Beam Deflection.

We present a comprehensive investigation of the dielectric behavior and geometric structures of cold neutral Si clusters of intermediate size with = 12-30 atoms. For this, cryogenic electric beam deflection experiments were carried out for the first time for Si clusters at nozzle temperatures below 30 K. In combination with quantum chemical calculations based on density functional theory and classical trajectory simulations of the rotational dynamics in the electric field, the geometric structures of the clusters are discriminated.

Correction: Optical absorption and shape transition in neutral Sn clusters with ≤ 40: a photodissociation spectroscopy and electric beam deflection study.

Correction for 'Optical absorption and shape transition in neutral Sn clusters with ≤ 40: a photodissociation spectroscopy and electric beam deflection study' by Andreas Lehr , , 2022, , 11616-11635, https://doi.org/10.1039/D2CP01171A.

Scaling of the permanent electric dipole moment in isolated silicon clusters with near-spherical shape.

In silicon clusters a structural transition from prolate to near-spherical structures takes place at a size of about 25-30 atoms. While some of the prolate clusters are very polar, there has been no experimental evidence of the presence of dipole moments in larger silicon clusters with near-spherical shape. By means of electric molecular beam deflection experiments at cryogenic temperatures, it was possible to prove for the first time that Si clusters with more than = 30 atoms are also polar.

Enhanced Electronic -Factors in Magic Number Main Group Bimetallic Nanoclusters.

We report the observation of large electronic -factors in magic number main group bimetallic nanoclusters by performing Stern-Gerlach deflection experiments at 10 K. The clusters AlPb and InPb exhibit values of = 3.5-4.

Joint electric and magnetic beam deflection experiments and quantum chemical studies of MSn clusters (M = Al, Ga, In): on the interplay of geometric structure and magnetic properties in nanoalloys.

MSn clusters (M = Al, Ga, In) were studied in electric and magnetic beam deflection experiments at temperatures of 16 K and 30 K. For all three species, the results of the electric beam deflection experiments indicate the presence of two structural isomers of which one is considerably polar. The magnetic beam deflection experiments show atom-like beam splitting (superatomic behavior) with -factors of 2.

Optical absorption and shape transition in neutral Sn clusters with ≤ 40: a photodissociation spectroscopy and electric beam deflection study.

Neutral Sn clusters with = 6-20, 25, 30, 40 are investigated in a joint experimental and quantum chemical study with the aim to reveal their optical absorption in conjunction with their structural evolution. Electric beam deflection and photodissociation spectroscopy are applied as molecular beam techniques at nozzle temperatures of 16 K, 32 K and 300 K. The dielectric response is probed following the approach in S.

The role of vibronic coupling in the electronic spectroscopy of maleimide: a multi-mode and multi-state quantum dynamics study.

The first two excitation bands below 7 eV in the electronic absorption spectrum of maleimide are investigated using a model Hamiltonian including four low-lying singlet excited states within the manifold of 24 vibrational modes. The role of non-adiabatic effects is studied and shines light on both the broad, inter-state coupling-dominated spectral band as well as the fine-structured, not-so-strong coupled band. Calculations have been performed using the Multiconfigurational Time-Dependent Hartree (MCTDH) wavepacket propagation method as well as its multilayer version (ML-MCTDH) using a quadratic vibronic coupling (QVC) Hamiltonian model where parameters are obtained from fitting adiabatic potential energy surfaces computed by ab initio methods.

Optical Absorption of Atomically-Precise Sn Nanoclusters: The Antagonistic Interplay of Ligand Stabilization, Molecular Symmetry, and Solvatochromism.

The synthesis of atomically precise clusters is nowadays well established. The study of isolated clusters in the gas phase has also become an approved field of research. Although both approaches examine the same research objects, namely nanoclusters, little is known about to what extent results from gas phase studies can be transferred to colloidal systems and vice versa.