Nuclear physicists have experimentally confirmed the existence of the tetraneutron, a meta-stable nuclear system that can decay into four free neutrons. Researchers have predicted the tetraneutron’s existence since 2016. The new results, which agree with predictions from supercomputer simulations, will help scientists understand atomic nuclei, neutron stars, and other neutron-rich systems.
Colliding atomic nuclei at very high energies “melts” the boundaries of individual protons and neutrons, setting quarks and gluons to form a quark-gluon plasma (QGP). Quarks or gluons in the colliding ions sometimes scatter off one another and then split, forming parallel sprays of particles called jets. Tracking how jets lose energy, called “quenching,” allows scientists to learn about the QGP and the nuclear strong force. New results find that some quarks lose energy even before they split to form a jet.
Nuclear physicists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) have new evidence that particles called gluons reach a steady “saturated” state inside the speeding ions.
Jean Clifford (Cliff) Brutus, an engineer at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory, has a cool job–literally. He’s developing components to keep particle beams circulating in the Lab’s Relativistic Heavy Ion Collider (RHIC) cool.
The Simons Foundation has announced a new research collaboration to explore the “glue” that holds the visible matter of the universe together. This team will delve into the details of quantum chromodynamics (QCD) — the theory that describes the interactions among the most fundamental building blocks of visible matter.
Today, the U.S. Department of Energy (DOE) awarded more than $3.6 million with a focus on broadening and diversifying the nuclear and particle physics research communities through research traineeships for undergraduates from Historically Black Colleges and Universities (HBCUs) and other Minority Serving Institutions (MSIs). The goal of this program is to increase the recruitment and retention of students from groups under-represented in nuclear physics and to create new partnerships with HBCUs and MSIs. Only by accessing the broadest possible pool of potential physicists can the community produce the best possible science.
Scientists have found a way to “see” inside deuterons, the simplest atomic nuclei, to better understand how particles called gluons are arranged within the deuteron. These collisions can also break the deuteron apart, giving insights into what holds the proton and neutron together. The research helps scientists understand how nuclei emerge from quarks and gluons, and how the masses of nuclei are dynamically generated by gluons.
The 2022 JSA Postdoctoral Prize winner, Arkaitz Rodas, characterizes lesser-known particles to help physicists understand what holds matter together. Rodas will characterize light mesons using computational mathematical tools for his prize-winning project.
Many of the nuclear physicists tuning in to the 2022 Relativistic Heavy Ion Collider (RHIC) & AGS (Alternating Gradient Synchrotron) Users’ Meeting participated in a half-day workshop on June 8 dedicated to diversity, equity, and inclusion (DEI) and workforce development in the nuclear physics community.
To solve a long-standing puzzle about how long a neutron can “live” outside an atomic nucleus, physicists entertained a wild but testable theory positing the existence of a right-handed version of our left-handed universe.
Iowa State University’s James Vary and an international team of nuclear physicists used supercomputers to theorize and predict that a four-neutron structure, a tetraneutron, could form for just billions of billionths of a second. Experiments in Japan have now confirmed the reality of a tetraneutron.
Today, U.S. Secretary of Energy Jennifer Granholm announced ten U.S. scientists and engineers as recipients of the prestigious Ernest Orlando Lawrence Award for their exceptional contributions in research and development supporting the Energy Department’s missions in science, energy, and national security. Established in 1959, the Lawrence Award recognizes mid-career U.S. scientists and engineers who have advanced new research and scientific discovery in nine categories representing the broad science and engineering missions of DOE and its programs. The awards are among the longest running and most prestigious science and technology awards bestowed by the U.S. Government.
The international KArlsruhe TRItium Neutrino (KATRIN) experiment in Germany recently reported a new upper limit on the mass of the neutrino. This limit—0.8 electronvolts (eV)—is the lowerst scientists have achieved. As the results are confirmed and refined, they will help scientists better understand the neutrino and its role in the evolution of the universe.
At Lawrence Livermore National Laboratory, Andreas Kemp studies the interaction of intense, extremely short laser pulses with matter. This new field of research studies extreme nuclear physics reactions at rates far higher than those of current accelerator experiments.
Scientists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) have revealed how certain particle-jets lose energy as they traverse the unique form of nuclear matter created in these collisions. The results should help them learn about key transport properties of this hot particle soup, known as a quark-gluon plasma (QGP).
A new flagship facility for nuclear physics has opened, and scientists from Oak Ridge National Laboratory have a hand in 10 of its first 34 experiments.
Two graduate students at Virginia universities who plan to conduct research at the U.S. Department of Energy’s Thomas Jefferson National Accelerator Facility have just received grants toward their projects. They are among 80 graduate students representing 27 states selected to receive support through the Office of Science Graduate Student Research (SCGSR) program’s 2021 Solicitation 2 cycle.
After running simulations on the world’s most powerful supercomputer, an international team of researchers has developed a theory for the nuclear structure and origin of carbon-12, the stuff of life. The theory favors the production of carbon-12 in the cosmos.
Theoretical physicists have proposed a new method to measure the speed of sound in quark-gluon plasma. The speed of sound is determined by a material’s properties, so measuring it helps scientists understand that material. These studies reveal the way quarks and gluons interact with each other and offers new insights on matter in the early Universe.
On Oct. 25, the U.S. Department of Energy’s Thomas Jefferson National Accelerator Facility welcomed U.S. Secretary of Energy Jennifer Granholm and honored guests for a short tour of the lab and briefing on its research mission and plans for the future.
Iowa State physicists are contributing their expertise and sending thousands of pounds of Ames-manufactured hardware to the sPHENIX experiment at Brookhaven National Laboratory in New York. The experiment’s particle detector is designed to explore the flowing, liquid-like, quark-gluon plasma.
Scientists from Argonne and Michigan State University have completed the first tests using a new particle accelerator to gain insights into the creation of carbon in stars.
The protective coatings are intended to extend the lifetime of the materials for applications in nuclear physics facilities.
New evidence suggests protons and neutrons go through a “first-order” phase transition to reach their melted state, a soup of quarks and gluons. This is a kind of stop-and-go change in temperature is similar to how ice melts: energy first increases the temperature.
Protons and neutrons orbit atomic nuclei in shells with caps on how many protons or neutrons they can hold. Full shells mean stable, compact nuclei. Physicists call the number of protons or neutrons in a “magic” numbered full shell. New research shows that a previously reported “magicity” for number 32 does not appear in neutron-rich potassium isotopes.
Physicists from the STAR Collaboration of the Relativistic Heavy Ion Collider (RHIC), a U.S. Department of Energy (DOE) Office of Science user facility for nuclear physics research at DOE’s Brookhaven National Laboratory, presented long-awaited results from a “blind analysis” of how the strength of the magnetic field generated in certain collisions affects the particles streaming out.
Andrew Jackura wants to know what we’re made of. Now, as the winner of the 2021 Jefferson Science Associates (JSA) Postdoctoral Prize, he’ll get the chance to find out. Jackura is a postdoctoral research scientist at Old Dominion University and a scientific user at the U.S. Department of Energy’s Thomas Jefferson National Accelerator Facility. His research focuses on the strong nuclear force, the fundamental force responsible for keeping all ordinary matter in the universe together, including us.
The proton was discovered just over a hundred years ago and has been intensely studied ever since. Yet, there’s still more to learn about this important building block of the visible universe. Now, work toward a better understanding of the proton carried out at the Department of Energy’s Thomas Jefferson National Accelerator Facility has earned Weizhi Xiong the 2020 Jefferson Science Associates (JSA) Thesis Prize.
Scientists studying particle collisions at the Relativistic Heavy Ion Collider have produced definitive evidence for two physics phenomena predicted more than 80 years ago: that matter/antimatter can be generated directly from collisions of photons and that a magnetic field can bend polarized light along different paths in a vacuum.
The Electron-Ion Collider Center at the Department of Energy’s Thomas Jefferson National Accelerator Facility (EIC Center at Jefferson Lab) has announced the winners of six international fellowships to help advance the science program of the Electron-Ion Collider (EIC).
The slow neutron-capture process (the s-process) in nucleosynthesis results in about half of the elements heavier than iron in the universe. Two important reactions in the s-process are Neon-22 (alpha, gamma) and Neon-22 (alpha, neutron), which affect the abundances of elements such as Selenium, Krypton, Rubidium, Strontium, and Zirconium. Researchers recently used two indirect methods to study the reactions.
Researchers placed tiny GPS trackers on rat snakes to track their movements at Fukishima
Great leaps in science and technology have been propelled by recent advances in seeing fast evolving physical phenomena, as they happen. Femtosecond lasers from the infrared to the X-ray region have enabled us to ‘watch’, in real time, atoms dance…
Advanced capabilities ranging from the innovative use of artificial intelligence (AI) to state-of-the-art computer codes have won the U.S. Department of Energy’s (DOE) Princeton Plasma Physics Laboratory (PPPL) its third straight round of DOE-sponsored public-private partnerships to help accelerate the…
Bismuth borate glasses were shown outperformance while compared with the commercial ones
The study could have applications in spintronics and quantum computing; it was conducted by an international collaboration and published in Nature; its first author is a researcher at the University of São Paulo
“Heavy fermions” are an appealing theoretical way to produce quantum entangled phenomena, but until recently have been observed mostly in dangerously radioactive compounds. A new paper shows it is possible to make them in subtly modified graphene
The MOLLER experiment has received additional grants totaling $9 million
Imagine a dust particle in a storm cloud, and you can get an idea of a neutron’s insignificance compared to the magnitude of the molecule it inhabits.
Brand new, state-of-the-art components for an upgraded 1000-ton particle detector are being installed at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory. Known as sPHENIX, the detector is a radical makeover of the PHENIX experiment, which first began taking data at the Lab’s Relativistic Heavy Ion Collider (RHIC) in 2000.
Radioactive molecules are sensitive to subtle nuclear phenomena and might help physicists probe the violation of the most fundamental symmetries of nature.
Liverpool leads £1.17 million innovative future MSR reactor project
Researchers account for some of the lithium missing from our universe
Argonne’s Maria Goeppert Mayer is one of only four women to win the Nobel Prize in physics. Today, on her 115th birthday, Argonne announces the award of its 2022 Maria Goeppert Mayer Fellowship to four outstanding early-career doctoral scientists.
Today, the U.S. Department of Energy awarded over $2.85 million with a focus on broadening and diversifying the nuclear and particle physics research communities through research traineeships for undergraduates from Historically Black Colleges and Universities and other Minority Serving Institutions.
The overall growth of the Industry 4.0 and subsequent demand for new innovative materials opens a new field of mechanism to control premature degradation of the material. This book entitled ‘Corrosion Science-Modern Trends and Applications’ with twelve high-quality chapters provided…
The U.S. Department of Energy has selected Iowa State’s Srimoyee Sen for an early career award that will help her study nuclear physics and quantum phenomena. The research could lead to the discovery of new materials that could one day contribute to speedy quantum computing or other applications.
As the Deputy Group Leader of the Nuclear Data and Theory Group at Lawrence Livermore National Laboratory, Sofia Quaglioni is contributing to a unified understanding of the structure and lower-energy reactions of light nuclei.
This highly contributes to producing the efficient heat removal component for fusion reactor
In a major scientific leap, University of Queensland researchers have created a quantum microscope that can reveal biological structures that would otherwise be impossible to see. This paves the way for applications in biotechnology, and could extend far beyond this…