Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 23: Atomic Clusters (joint session A/MO)

A 23.7: Talk

Wednesday, March 13, 2024, 16:00–16:15, HS 1015

Superradiant parametric Mössbauer radiation — •Ze-An Peng, Christoph H. Keitel, and Jörg Evers — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

Mössbauer nuclei facilitate a broad range of applications based on their spectrally narrow resonances at energies of hard X-rays. However, the narrow resonances render a strong excitation via intense X-ray beams challenging. This motivates a search for alternative excitation sources.

Parametric X-ray radiation (PXR) is a well-known mechanism for generating high-quality x-ray beams, which is based on intense relativistic electron beams passing through crystals. If the crystal contains Mössbauer nuclei, then under suitable conditions spectrally narrow parametric Mössbauer radiation (PMR) can be emitted [1]. Recently, a new scheme of superradiant PXR was proposed which employs coherently modulated electron bunches produced in X-ray free-electron laser accelerators [2]. This boosts the PXR intensity generated from the crystal by orders of magnitude.

Here, we construct a superradiant parametric Mössbauer radiation source, which is rendered possible by an extended configuration in which the conditions for superradiant PXR and the Mössbauer resonance condition can be satisfied simultaneously. After illustrating the operation principle of the source, the properties of the generated X-ray beam and possible applications will be discussed.

[1] O. D. Skoromnik, I. D. Feranchuk, J. Evers, and C. H. Keitel, Phys. Rev. Accel. Beams 25, 040704 (2022). [2] I. D. Feranchuk, N. Q. San, and O. D. Skoromnik, Phys. Rev. Accel. Beams 25, 120702 (2022).

Keywords: Moessbauer resonance; Parametric X-ray radiation; X-ray quantum optics; Superradiance