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Nuclear and Chemical Sciences
Fentanyl or phony? Machine-learning algorithm learns to pick out opioid signatures
New forms of fentanyl are created every day. For law enforcement, that poses a challenge: how do you identify a chemical you’ve never seen before? Researchers at Lawrence Livermore National Laboratory (LLNL) aim to answer that question with a machine-learning model that can distinguish opioids from other chemicals with an accuracy over 95% in a laboratory setting. The…
What is dark matter? Explore the possibilities in the Big Ideas Lab podcast
Galaxies spin faster than they should. Clusters of those galaxies hold themselves intact against all expectations. By every visible measure, the universe should not look the way it does. Something is holding galaxies, stars and entire clusters together. Something we can’t see. And although it’s invisible to the naked eye, there are clues everywhere that allude to its…
Meet the strangest particle in physics in the latest episode of the Big Ideas Lab podcast
There are particles in our universe so unique and so strange that they can shift form mid-flight. They’re as old as time, coming from the beginning of the universe, stars, nuclear reactions and the earth. And they’re everywhere — even passing through you at this very second: neutrinos. Studying these mysterious particles may unlock answers to some of humanity’s most…
Measuring nuclear reactions found inside stars
Radiochemistry experts at Lawrence Livermore National Laboratory (LLNL) recently made the first experimental measurements of nuclear reactions in high-energy-density plasma environments, which are similar to conditions found in stars, as well as thermonuclear explosions. According to John Despotopulos, an LLNL radiochemist who leads the research team, the ability to…
Next-generation light sensors for neutrino detection
Detecting neutrinos and other elusive subatomic particles often relies on capturing tiny flashes of light produced when these particles interact with specialized detection media. In water-based scintillators, there is a competition between Cherenkov light (which is faint but directional and prompt) and scintillation light (which is strong but uniformly emitted and delayed)…
Superconducting circuits: How LLNL is building on Nobel Prize-winning quantum technology
This fall, the Nobel Prize in Physics was awarded to John Clarke, Michel Devoret and John Martinis “for the discovery of macroscopic quantum mechanical tunnelling and energy quantization in an electric circuit.” At Lawrence Livermore National Laboratory (LLNL), these award-winning discoveries underpin two fronts of ongoing innovation: fundamental research in quantum…
LLNL’s Rebecca Toomey recognized with Division of Nuclear Physics’ Distinguished Service Award
Rebecca Toomey, a postdoctoral research scientist at Lawrence Livermore National Laboratory (LLNL), has been recognized with the American Physical Society (APS) Division of Nuclear Physics’ (DNP) Distinguished Service Award. The honor is intended to recognize those who have made substantial and extensive contributions to the nuclear physics community through the activities…
LZ dark matter experiment sets a world’s best and spots neutrinos from the sun’s core
There’s more to the universe than meets the eye. Dark matter, the invisible substance that accounts for 85 percent of the mass in the universe, is hiding all around us — and figuring out exactly what it is remains one of the biggest questions about how our world works. The newest results from LUX-ZEPLIN (LZ) extend the experiment’s search for low-mass dark matter and set…
Undergraduate interns explore nuclear physics research at LLNL
Scientists at Lawrence Livermore National Laboratory (LLNL) recently helped launch a new internship program aimed at connecting with undergraduate students at two nearby California State University (CSU) campuses and inspiring them to consider a science-focused research career. The new program, which started in early 2025, involves multiple staff and postdocs from the Lab…
Energy-efficient process delivers rare-earth element for magnets
Neodymium is a rare-earth element essential for producing the strongest permanent magnets, which are widespread in defense technologies, hard drives, medical imaging devices, electric vehicle motors, wind turbines and more. Despite its designation in the U.S. as a critical material, neodymium is primarily mined and refined overseas. China controls much of the supply chain,…
Meteorite samples are time capsules from the early solar system
When a meteor streaks across the sky, it’s not just beautiful. It’s nature’s way of delivering a time capsule to Earth. Contained within are hints about the very beginning of the solar system and how planets, including our own, formed. Lawrence Livermore National Laboratory (LLNL) scientist Thomas Kruijer and collaborators describe how meteorites tell the story of the…
LLNL’s Wei Jia Ong receives American Physical Society’s 2025 Freedman Award
Wei Jia Ong, a staff scientist at Lawrence Livermore National Laboratory (LLNL), has been recognized as the recipient of the American Physical Society’s (APS) 2025 Stuart Jay Freedman Award in Experimental Nuclear Physics. The award is presented annually to an outstanding early career experimentalist in nuclear physics. Ong was selected for her work “spearheading a…
River ecosystem that converts air to fertilizer could hold clues for sustainable nitrogen production
Every living thing needs nitrogen, and the world uses a significant portion of its energy making nitrogen fertilizer for agriculture. Studying microorganisms that naturally capture atmospheric nitrogen — a process called nitrogen fixation — can inspire new sustainable methods to produce fertilizers, saving energy and reducing water pollution. In a new study, published in…
Learn what it takes to make a new element with the Big Ideas Lab podcast
Scientists are still adding to the periodic table and expanding what we know about matter. At Lawrence Livermore National Laboratory (LLNL), researchers are creating entirely new elements that exist for only moments. In the latest episode of the Big Ideas Lab, step into the world of superheavy element discovery to understand how these rare atoms are made, why they matter…
Samples from asteroid Bennu contain secrets of the early solar system
In September 2023, NASA’s Origins, Spectral Interpretation, Resource Identification, and Security–Regolith Explorer (OSIRIS-REx) mission became the first U.S. mission to collect a sample of material from an asteroid and return it to Earth. Now, a team including researchers at Lawrence Livermore National Laboratory (LLNL) has analyzed that material. Their work, published in…
First-of-its-kind microscope takes 3D ghost images of nanoparticles
Ghost imaging is like a game of Battleship. Instead of seeing an object directly, scientists use entangled photons to remove the background and reveal its silhouette. This method can be used to study microscopic environments without much light, which is helpful for avoiding photodamage to biological samples. So far, quantum ghost imaging has been limited to two dimensions,…
Big Ideas Lab podcast visits the Forensic Science Center: part 2
Lawrence Livermore National Laboratory’s Forensic Science Center (FSC) is a unique place. It is the only forensic science center in the United States that could accept a truly mixed hazard sample — with a biological material, a chemical agent, explosives and nuclear material. It is one of only two laboratories in the United States — and among 30 in the world — that is…
LLNL and Purdue University accelerate discovery of medical countermeasures for emerging chemical threats
In a major advance for chemical defense and public safety, scientists at Lawrence Livermore National Laboratory’s (LLNL) Forensic Science Center (FSC) and Purdue University have developed and demonstrated a high-throughput, automated mass spectrometry platform. Their platform dramatically accelerates the discovery of medical countermeasure candidates against A-series…
Big Ideas Lab podcast delves into Forensic Science Center cases, podcast nears milestone
In May 1999, Bulgarian customs officials seized a vial containing a small amount of highly enriched uranium (HEU) at a checkpoint on the Bulgarian/Romanian border. The material, about four grams of HEU, was hidden in a shielded lead container inside the trunk of a car being driven by a Turkish citizen. The driver had first attempted to sell the material in Turkey and then…
Five LLNL postdocs selected to attend 2025 Lindau Nobel Laureate Meetings
Five Lawrence Livermore National Laboratory (LLNL) postdoctoral researchers have been selected to participate in the prestigious 2025 Lindau Nobel Laureate Meetings. Ian Colliard, Nicholas Cross, Caspar Donnison, Vidia Gokool and Jonas Kaufman will join young scientists from around the world to learn from Nobel Prize laureates through academic panels, lectures, group…
