see also: [[Electron Mobility]] # The Mobility-Lifetime Product ($\mu \tau$) In solid-state physics the mobility-lifetime product is a parameter that characterizes "spectroscopic semiconductor radiation detectors" [^1] that quantifies the charge collection efficiency with the [[Hecht Equation]]. In this product term, there are two parameters to consider: - The [[Electron Mobility|charge mobility]], $\mu$ - The [[Charge Carrier Lifetime]], $\tau$ Sometimes also known as the "trapping length" ($l$), where it quantifies an estimation of how long a charge carrier can move among the material without being trapped [^2]. [^1]: [[@uxaEvaluationMobilitylifetimeProduct2013]] [^2]: [[@arino-estradaMeasurementMobilityLifetime2014]]