A<sup>220</sup>Rn source for the calibration of low-background experiments
A<sup>220</sup>Rn source for the calibration of low-background experiments
We characterize two 40 kBq sources of electrodeposited 228Th for use in low-background experiments. The sources efficiently emanate 220Rn, a noble gas that can diffuse in a detector volume. 220Rn and its daughter isotopes produce α-, β-, and γ-radiation, which may used to calibrate a variety of detector responses and …