Monday 10 March 2025
Scientists have made a significant breakthrough in the development of a new technique for analyzing the elemental composition of materials, using muons – tiny subatomic particles that interact with atomic nuclei. The method, known as Muon-Induced X-ray Emission (MIXE), has long been used to study the properties of materials, but its application has been limited by the need to calibrate the detectors used in the process.
The new technique, developed by researchers at the Paul Scherrer Institute in Switzerland, uses a Time Projection Chamber (TPC) equipped with Gas Electron Multiplier (GEM) amplification stages to track the paths of muons as they interact with a material. The TPC is designed to capture the precise trajectory of each muon, allowing scientists to pinpoint exactly where it stopped and what elements it encountered along the way.
To achieve this level of precision, the researchers had to develop a new method for calibrating the drift velocity of the electrons in the gas used in the TPC. This was done by creating a compact fiber detector that could measure the timing of muon interactions with high accuracy. The detector consists of three scintillating optical fibers spaced 4 millimeters apart, which are read out by a high-speed Silicon Photomultiplier.
The researchers tested their new technique using two different gas mixtures – Ar/CO2 and He/CO2 – and found that it was capable of accurately identifying the elemental composition of materials with depths ranging from microns to centimeters. This is particularly significant for scientists studying delicate or valuable materials, as it allows them to analyze the composition of the material without having to physically damage it.
The development of this new technique has far-reaching implications for a range of scientific fields, including archaeology, geology and materials science. It could be used to study the composition of ancient artifacts, track the movement of tectonic plates over millions of years, or analyze the properties of new materials being developed for use in everything from electronics to medicine.
One of the most exciting potential applications of this technique is its ability to analyze the elemental composition of materials in situ, without having to physically remove them from their natural environment. This could be particularly useful for scientists studying biological systems, such as the human body, where analyzing the composition of tissues and organs in their natural context could provide valuable insights into disease processes.
Cite this article: “Muon-Induced X-ray Emission Technique Unlocks New Possibilities for Elemental Analysis”, The Science Archive, 2025.
Muons, Elemental Composition, Materials Analysis, X-Ray Emission, Time Projection Chamber, Gas Electron Multiplier, Calibration, Drift Velocity, Fiber Detector, Silicon Photomultiplier
