Nuclear forensics research at NC State University

It's truly mind-blowing to think about the secrets hidden in everyday objects, like old bricks! My research at NC State, which focuses on nuclear forensics, is all about uncovering those secrets by turning these unassuming construction materials into powerful radiation detectors. We're essentially making these bricks 'see' the world in a whole new way, revealing accumulation of background radiation and looking for large signals caused by anthropogenic sources. But what if the clues we're looking for aren't just about the radiation itself, but also about identifying the perpetrators or the specific origins of materials? That's where the broader, fascinating world of forensic science really shines, weaving together multiple disciplines to solve complex puzzles. While my direct work leverages specific techniques like thermoluminescence and optically stimulated luminescence to detect radiation exposure in materials, it’s fascinating to consider other powerful tools available in the wider field of nuclear forensics. For instance, 'nuclear DNA analysis,' though not explicitly part of my current project, is a critical component in many comprehensive investigations. Imagine a scenario where investigators need to identify individuals involved in handling illicit nuclear materials, or even trace the biological origins of contaminants found at a site. This type of genetic fingerprinting offers an unparalleled ability to link specific persons to substances or locations, providing crucial human-element evidence. It beautifully complements radiation detection by adding a layer of personal identification to the investigation, helping piece together not just what happened, but who might have been involved in a nuclear incident or proliferation attempt. It's a powerful reminder that forensic science is an intricate puzzle where every piece of evidence, from gamma-ray signatures to microscopic genetic markers, tells a vital part of the story. My research, transforming common insulator materials like bricks into radiation detectors to find anthropogenic sources of radiation, sits squarely within the vital realm of 'environmental forensics.' This field is dynamically applying scientific methods to investigate and resolve environmental crimes or issues, ranging from pollution and illicit dumping to identifying the source of contamination. When we detect unusual accumulation of background radiation or specific anthropogenic signals in the environment using our brick-detectors, we're essentially performing a specialized environmental forensic investigation. For those deeply engrossed in the academic side, the 'impact factor' of journals in environmental forensics signifies how influential and frequently cited the research published in that field is. High impact factors reflect groundbreaking studies that not only advance our scientific understanding but also significantly improve our ability to protect and restore our environment, making research like NC State's an important contribution to the global effort. The process of analyzing materials like bricks to understand their radiation history and identify potential illicit uses also heavily relies on the intricate principles of 'forensic chemistry.' This discipline applies chemical analysis to examine evidence for legal purposes, and it's fundamental to understanding the composition and history of materials. The techniques I use, such as electron paramagnetic resonance, are sophisticated chemical methods that allow us to understand the properties and past exposures of materials at a molecular level. Identifying specific isotopes, elements, or chemical signatures through these advanced radiation detectors is inherently a chemical endeavor. Like environmental forensics, the 'impact factor' for journals in forensic chemistry showcases the importance of innovative analytical techniques and groundbreaking discoveries. When new chemical methods allow for more precise detection of illicit substances or the origin of nuclear materials, it significantly boosts the field's impact, helping to ensure safety and security. It's truly incredible how specific chemical reactions and material properties can become silent witnesses in a complex investigation, helping us identify those unsightly radioactive materials and prevent proliferation.