Objective
In nuclear resonant scattering of Moessbauer or synchrotron radiation (SR) a collective excited state, phased in space and time, is created, called a nuclear exciton. After the prompt excitation by a SR pulse, the free decay of the nuclear exciton can be observed. The characteristics of the nuclear exciton decay are of fundamental interest and are also of great importance for the recently established and fast expanding field of nuclear resonant spectroscopy using SR.
In dynamic systems the free decay of the nuclear exciton is perturbed. It is the objective of the project to study the decay of the nuclear exciton in the presence of dynamics in the scattering nuclear ensemble.
For this purpose experiments will be carried out, which involve either inherent (intrinsic) or applied (external) perturbations. In these experiments the perturbations affect either the spatial phases (intrinsic e.g. in case of diffusion, external in case of application of ultrasound) or the nuclear excited state (intrinsic e.g. in case of critical magnetic fluctuations, external in case of application of radio frequency fields).
Furthermore, the project is aimed at testing the feasibility and the impact of nuclear resonant scattering of SR for studying in general dynamical phenomena in condensed matter, such as lattice dynamics, diffusion, relaxation, and critical fluctuations.
The participants of this project have practiced a longtime and highly effective scientific collaboration, which has essentially contributed to the development of the field.
The results of the research programme will be presented as scientific papers, reports, contributions to international conferences, as program packages for computer simulations and as descriptions of designs of specific equipment.
Topic(s)
Call for proposal
Data not availableFunding Scheme
Data not availableCoordinator
85748 Garching
Germany