Freiburg 2024 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 2: Attosecond Physics I (joint session A/MO)

A 2.4: Vortrag

Montag, 11. März 2024, 11:45–12:00, HS 1098

Time- and Frequency-resolved Characterization of Collective Nuclear Dynamics — •Lukas Wolff and Jörg Evers — Max-Planck-Institut für Kernphysik Heidelberg, Germany

Mössbauer nuclei have become an important tool for high precision tests and spectroscopy owing to their extremely narrow linewidths and long coherence times. In recent years, ensembles of nuclei embedded in suitably engineered waveguide structures allowed for the observation of cooperative phenomena such as superradiant decay and collective level shifts. This constituted the field of nuclear quantum optics of collective nuclear excitations. A direct and unambiguous characterization of such level schemes in the time or frequency domain alone is challenging and, thus, new data acquisition and evaluation techniques are of great importance to access the underlying collective dynamics [1]. To this end, we study the time- and frequency-resolved collective behaviour of nuclear ensembles upon x-ray pulses with different temporal and spectral shape to extract signatures for collective and nonlinear dynamics of Mössbauer resonances [2]. We expect our results to help guide future experiments investigating such dynamics using suitably-shaped x-ray pulses and pulse sequences that can be created using time-domain control of nuclear resonances.
[1] L.Wolff and J.Evers, Phys.Rev.Res. 5, 013071 (2023)
[2] L.Wolff and J.Evers, Phys.Rev.A 108, 043714 (2023)

Keywords: Mössbauer effect; quantum optics; nuclear resonant scattering; precision spectroscopy