Positron Annihilation Lifetime Spectroscopy Measurements to Elucidate Porosity of Carbon Capture Materials

NIST researchers are working to refine positron annihilation lifetime spectroscopy (PALS) measurements to better understand carbon capture materials. PALS is a novel technique used to investigate voids or pores in many different materials and has previously shown promise for evaluating porosity in many materials. Many models for the performance of novel carbon capture materials rely on porosity as an input metric; however, direct measurement of porosity is challenging. PALS offers the potential to directly measure porosity for th...