Correction to: Primary standardization of the massic activity of a 233 Pa solution

In the original publication, the value “2.611·10 4 Bq g −1 ” in the sentence “The measured massic activity of 233 Pa at the reference time was 2.611·10 4 Bq g −1 with a combined standard uncertainty of 0.93%.” under the heading “HPGe detector activity determination” should be read as “2.632·10 4 Bq g −1 ”.