Pr(HBNMeBH) and Pr(thd) as Volatile Carriers for Actinium-225. Deposition of Actinium-Doped Praseodymium Boride Thin Films for Potential Use in Brachytherapy.

Here we show that the praseodymium ,-dimethylaminodiboranate complex Pr(HBNMeBH) and the 2,2,6,6-tetramethylheptane-3,5-dionate complex Pr(thd) can serve as volatile carriers for Ac. The actinium coordination complexes Ac(HBNMeBH) and Ac(thd) are the likely species subliming with the carrier material. A sample of Ac-doped Pr(HBNMeBH) was used to deposit amorphous Ac-doped praseodymium boride films on glass and Si(100) at 300 °C. The α emission spectra of the refractory films are well-resolved, suggesting that they could be used as radioactive implants for brachytherapy and related treatments.