Mapping partial wave dynamics in scattering resonances by rotational de-excitation collisions.

One of the most important parameters in a collision is the 'miss distance' or impact parameter, which in quantum mechanics is described by quantized partial waves. Usually, the collision outcome is the result of unavoidable averaging over many partial waves. Here we present a study of low-energy NO-He collisions that enables us to probe how individual partial waves evolve during the collision.

Experimental and theoretical investigation of resonances in low-energy NO-H collisions.

The experimental characterization of scattering resonances in low energy collisions has proven to be a stringent test for quantum chemistry calculations. Previous measurements on the NO-H system at energies down to 10 cm challenged the most sophisticated calculations of potential energy surfaces available. In this report, we continue these investigations by measuring the scattering behavior of the NO-H system in the previously unexplored 0.

Correlations in rotational energy transfer for NO-D inelastic collisions.

We present a combined experimental and theoretical study of state-to-state inelastic collisions between NO (X Π, j = 1/2, f) radicals and D (j = 0, 1, 2, 3) molecules at collision energies of 100 cm and 750 cm. Using the combination of Stark deceleration and velocity map imaging, we fully resolve pair-correlated excitations in the scattered molecules. Both spin-orbit conserving and spin-orbit changing transitions in the NO radical are measured, while the coincident rotational excitation (j = 0 → j = 2) and rotational de-excitation (j = 2 → j = 0 and j = 3 → j = 1) in D are observed.

Imaging the onset of the resonance regime in low-energy NO-He collisions.

At low energies, the quantum wave-like nature of molecular interactions results in distinctive scattering behavior, ranging from the universal Wigner laws near 0 kelvin to the occurrence of scattering resonances at higher energies. It has proven challenging to experimentally probe the individual waves underlying these phenomena. We report measurements of state-to-state integral and differential cross sections for inelastic NO-He collisions in the 0.

Stability and Change of Adolescents' Aggressive Behavior in Residential Youth Care.

Background: Aggression in residential youth care institutions is a frequent problem.

Objective: The present short-term longitudinal study examined individual and institutional predictors of aggression in a group of 198 adolescents placed in open, semi-secure and secure residential institutions from the perspective of the importation and deprivation model.

Methods: A total of 198 adolescents in residential youth care filled in questionnaires regarding group climate and aggression with a 3 month interval.