Unveiling the Existence of the Elusive Tetraneutron

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.

Tracking Jets in Hot Quark Soup Reveals a Mechanism of ‘Quenching’

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.

Simons Foundation Announces New Collaboration on Confinement and QCD Strings

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.

Department of Energy Announces $3.6 Million for Research Traineeships to Broaden and Diversify Nuclear Physics

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.

‘Shining’ Light on the Inner Details and Breakup of Deuterons

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.

RHIC/AGS Users’ Meeting Emphasizes Diverse Workforce Opportunities

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.

Physicists confront the neutron lifetime puzzle

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.

Theoretical calculations predicted now-confirmed tetraneutron, an exotic state of matter

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.

Energy Secretary Granholm Announces 2021 Ernest Orlando Lawrence Award Winners

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.

Direct Neutrino-Mass Measurement Achieves New, Sub-Electronvolt Sensitivity

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.

Study Reveals How Some High-Energy Particle ‘Jets’ Lose Energy

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).

ORNL, partners launch first experiments using new facility to make cosmic isotopes on Earth

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 Virginia Graduate Students Get a Boost for Research

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.

Measuring the Speed of Sound in Dense Nuclear Matter

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.

Brookhaven Lab and Euclid Techlabs to Develop Coated Cathodes for Electron-Ion Collider

The protective coatings are intended to extend the lifetime of the materials for applications in nuclear physics facilities.

The Magic Is Gone for Neutron Number 32

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.

Results from Search for ‘Chiral Magnetic Effect’ at RHIC

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.

Postdoc Picks at the Three-Particle Problem

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.

Thesis Prize Winner Targets a Proton Puzzle

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.

Collisions of Light Produce Matter/Antimatter from Pure Energy

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.

Scientists Further Their Investigation into the Origin of Elements in the Universe

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.

Unlocking radiation-free quantum technology with graphene

“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

Argonne announces 2022 Maria Goeppert Mayer Fellows, honoring the legacy of the physics Nobel Laureate

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.

Department of Energy Announces $2.85 Million to Support Undergraduate Research Traineeships at HBCUs and other MSIs

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.

Application of new scientific techniques for corrosion protection

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…

Australian researchers create quantum microscope that can see the impossible

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…