Elastic Scattering

Man-made emissions of nitrous oxide (N₂O) are rapidly increasing globally and are predicted to pose a growing threat to Earth's ozone layer. In the 1970s, it was discovered that N₂O in the upper atmosphere can trigger ozone-depleting reactions through its interaction with low-energy electrons. However, the full impact of this process on the ozone layer remains poorly understood.

Scientists have conducted laboratory experiments at Lawrence Livermore National Laboratory (LLNL) that provide new insights on the complex process of pressure-driven ionization in giant planets and stars. Their research, published today in Nature, unveils the material properties and behavior of matter under extreme compression, offering important implications for astrophysics and nuclear fusion research.

Heat-transport measurements and neutron-scattering spectroscopy probe a form of thermal conduction based on excitations called phasons.

Particles colliding in accelerators produce numerous cascades of secondary particles. The electronics processing the signals avalanching in from the detectors then have a fraction of a second in which to assess whether an event is of sufficient interest to save it for later analysis. In the near future, this demanding task may be carried out using algorithms based on AI, the development of which involves scientists…

A new simulation approach named eTLE aims to improve the precision of a primary tool for estimating neutron behaviors in 3D space. This study examines the approach in detail—validating its reliability in predicting the scattering of neutrons in crystalline media.

Article URL: https://en.wikipedia.org/wiki/Sudbury_Neutrino_Observatory Comments URL: https://news.ycombinator.com/item?id=33611788 Points: 1 # Comments: 0

The strong force holds protons and neutrons together, but the theory behind it is largely inscrutable. Two new approaches show how it works.

Atoms make up everything around us, but do these building blocks of matter ever actually touch?

For nearly a century, dark matter has continued to evade direct detection, pushing scientists to come up with even more creative methods of searching. Increasingly sensitive detection experiments are a major undertaking, however, which means scientists want to be sure they analyze data from these experiments in the most thorough and robust way possible.

Scientists have conducted laboratory experiments at Lawrence Livermore National Laboratory (LLNL) that provide new insights on the complex process of pressure-driven ionization in giant planets and stars.

The soot produced by unburnt hydrocarbon flames is the second largest contributor to global warming, while also harming human health. Researchers have developed state-of-the-art, high-speed imaging techniques to study turbulent flames, yet they are limited to an imaging rate of million-frames-per-second. Physicists are therefore keen to obtain a complete picture of flame-laser interactions via single-pulse imaging.

Study by the University of Bonn and the TU Darmstadt suggests errors in the interpretation of older measurements. A few years ago, a novel measurement technique showed that protons are probably smaller than had been assumed since the 1990s. The discrepancy surprised the scientific community; some

Morgane König is a postdoc in theoretical cosmology at MIT and at Dartmouth College and is a 2023 MLK Visiting Scholar at MIT. Her research focuses on the study of the universe as a whole, from the era of inflation to the present.

A pollen grain showing the nanofoam within or a diatom with the individual geometric structures inside clearly visible: Using high-energy X-rays from the PETRA III synchrotron light source at DESY, a team led by CFEL scientists Saša Bajt and Henry Chapman has managed to image these structures without damaging them.

The DarkSide experiment is an ambitious research effort aimed at detecting dark matter particle interactions in liquid argon using a dual-phase physics detector located at the underground Gran Sasso National Laboratory. These interactions could be observed by minimizing background signals, and this could be possible thanks to the remarkable discrimination power of the scintillation pulse of liquefied argon in the…

"Charming" Experiment Finds Gluon Mass in the Proton Experimental determination of the proton's gluonic gravitational form factors may have revealed part of proton's hidden mass. Nuclear physicists may have finally pinpointed where in the proton a large fraction of its mass resides. A recent exp

Nuclear physicists may have finally pinpointed where in the proton a large fraction of its mass resides. A recent experiment carried out at the U.S. Department of Energy's Thomas Jefferson National Accelerator Facility has revealed the radius of the proton's mass that is generated by the strong force as it glues together the proton's building block quarks. The result was recently published in Nature.

Many applications rely on global theoretical models of how neutrons interact with nuclei over a wide range of incident neutron energies. These applications range from energy production to homeland security to medical treatments. Scientists develop these models by comparing calculations with experimental data. Excellent agreement between data and theory indicates that the interaction between the neutron and the…