Preparation of a 73As source sample for application in an offline ion source

For the generation of beams with the offline ion source at the Facility for Rare Isotope Beams (FRIB), suitable source samples are required. Arsenic-73 is a frequently requested user beam due to its significance in nuclear structure studies and astrophysics. In this work, we outline the process of preparing a ⁷³As source sample, containing (5.76 ± 0.37)∗10¹⁴ atoms of ⁷³As, which was successfully used to generate a ⁷³As beam for a multi-day user experiment. Silver arsenate was chosen as the chemical form, due to its favorable volatility within the designated operating temperature range. We refined the precipitation method using stable arsenic prior to its application with the ⁷³As sample, resulting in precipitation yields of (99.4 ± 4.5)%.