Tunable free-electron X-ray radiation from van der Waals materials — ScienceDaily

Researchers at the Technion — Israel Institute of Technology have developed precise radiation sources that may replace the expensive and cumbersome facilities currently used for such tasks. The suggested apparatus produces controlled radiation with a narrow spectrum that can be tuned with high resolution, at a relatively low energy investment. The findings are likely to lead to breakthroughs in a variety of fields, including the analysis of chemicals and biological materials, medical imaging, X-ray equipment for security screening, and other uses of accurate X-ray sources.

Published in the journal Nature Photonics, the study was led by Professor Ido Kaminer and his master’s student Michael Shentcis as part of a collaboration with several research institutes at the Technion: the Andrew and Erna Viterbi Faculty of Electrical Engineering, the Solid State Institute, the Russell Berrie Nanotechnology Institute (RBNI), and the Helen Diller Center for Quantum Science, Matter and Engineering.

The researchers’

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Study investigates the nature of X-ray binary IGR J18214-1318

Study investigates the nature of X-ray binary IGR J18214-1318
Swift’s XRT and BAT broadband spectrum of IGR J18214-1318. Top panel: data and best-fit model tbabs*pcfabs*(nthComp). Bottom panel: residuals in units of standard deviations. Credit: Cusumano et al., 2020.

Using various space observatories, Italian astronomers have investigated an X-ray binary source known as IGR J18214-1318. Results of the study, detailed in a paper published September 14 on the arXiv pre-print server, provide important information about the properties of this system, shedding more light into its nature.


X-ray binaries consist of a normal star or a white dwarf transferring mass onto a compact neutron star or a black hole. Based on the mass of the companion star, astronomers divide them into low-mass X-ray binaries (LMXBs) and high-mass X-ray binaries (HMXBs).

IGR J18214-1318 is an HMXB detected with the INTErnational Gamma-Ray Astrophysics Laboratory (INTEGRAL) satellite in 2006. The object is associated to USNO-B1.0 0766-0475700—most likely a star of spectral type O9I.

In

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