Testing for the Continuous Spectrum of X-Rays Predicted to Accompany the Photoejection of an Atomic Inner Shell Electron
Echoing classical physics, quantum electrodynamics predicts the release of a spectral continuum of electromagnetic radiation upon the sudden acceleration of charged particles in quantum matter. Despite apparent theoretical success in describing sister nuclear processes, known as internal bremsstrahlung, following nuclear beta decay and K capture, the situation of the photoejection of an electron from an inner shell of an atom, intraatomic bremsstrahlung (IAB), is far from settled.
Phase-specific deformation in additively manufactured Ni–CrC composites
New in situ high-energy X-ray diffraction research using the FAST beamline tested cold-spraying in additive manufacturing. Researchers found a high concentration of manufacturing defects and that the load-bearing properties of the material can be improved via post-spray treatments.
2021 Summer Shutdown Highlights
During the summer maintenance period, we made significant progress on a huge number of jobs. A few of the highlights include major upgrades to our power distribution infrastructure, upgrades to the linac and synchrotron RF power supplies, and repairs and maintenance to our cooling water systems. We also installed a new wide band-pass multilayer monochromator on the FAST beamline and new white beam slits for QM2. These projects promise to improve the performance and reliability of our systems.
CHESS User receives Early Career Award from NSF
Philip Milner, CHESS user and assistant professor of Chemical & Chemical Biology at Cornell University, has received the National Science Foundation Faculty Early Career Development Award. This award supports early-career faculty “who have the potential to serve as academic role models in research and education and to lead advances in the mission of their department or organization,” according to the NSF website.
Structural and magnetic transitions in the planar antiferromagnet Ba4Ir3O10
New research based at the QM2 beamline reports detailed investigations of low temperature charge and magnetic superstructures in Ba4Ir3O10. Contrary to previous reports, the researchers discover a series of phase transitions to different long-range ordered states, without evidence of the proposed liquid-like magnetic correlations.
Freeze! Researchers develop new protein crystallography tool
Combining state-of-the-art X-ray technology and cryogenics, Cornell physics researchers have developed a new method for analyzing proteins in action, a breakthrough that will enable the study of far more proteins than is possible with current methods.
Summer Students: Live and In-Person
CHESS Summer students came together last month for their first - and only - in-person meeting of the summer. The group of students have been working remotely with their mentors since the start of the program on June 6th due to Covid-safety precautions.
Progress in high-pressure crystallography at ID7B2 furthers the mission of HP-Bio
Recent developments at station ID7B2, jointly operated by MacCHESS and the HP-Bio project of CHEXS, demonstrate the use of high-pressure crystallography to examine the response of macromolecules to changes in pressure.