Measurement of the ${}^{39}$Ar specific activity in atmospheric argon with DArT at the Canfranc Underground Laboratory

P. Agnes, H. O. Back, S. Bharat +41

We report the measurement of the ${}^{39}$Ar specific activity of atmospheric argon using DArT, a low-background single-phase liquid-argon detector read out by cryogenic silicon phot…