High-purity X-ray polarimetry at high energies for Mössbauer spectroscopy
Abstract
High-purity X-ray polarimetry has so far been established only in the low-energy range up to 14.4 keV and has therefore been applied exclusively to the Mössbauer isotope 57Fe. Here we extend high-purity X-ray polarimetry to photon energies between 15 and 30 keV. Using asymmetric channel-cut Si crystals operated close to the Brewster angle, we design and realize a polarimeter optimized for synchrotron-based Mössbauer spectroscopy in this range of transition energies. As a demonstration, we implement a four-bounce Si (5 7 11) polarimeter at a photon energy of 22.494 keV at PETRA III and achieve a polarization purity of (1.2 ± 0.5) × 10-8. This establishes the polarimeter performance required for synchrotron Mössbauer spectroscopy at this energy and shows, supported by dynamical-diffraction calculations, that the method can be extended to nuclear transitions up to about 30 keV-opening access to isotopes such as 151Eu, 149Sm, 119Sn, and 161Dy. A nuclear-resonant measurement on these isotopes is the natural next step at a dedicated high-brilliance beamline.
Read the paper
Related studies
- The potential and limitations of neutrons, electrons and X-rays for atomic resolution microscopy of unstained biological molecules
- X-ray-Computed Tomography Contrast Agents
- Reactivity of Surface Species in Heterogeneous Catalysts Probed by In Situ X-ray Absorption Techniques
- Single-crystal X-ray diffraction studies on structural transformations of porous coordination polymers
- Investigation of solid/vapor interfaces using ambient pressure X-ray photoelectron spectroscopy
- Resonant X-Ray Scattering Studies of Charge Order in Cuprates
Go deeper in Evidence Hub
Evidence Hub adds a study data sheet (design, sample size, evidence level, key numbers), an AI summary and a chat grounded in the paper's text.