A novel way of producing an aqueous solution of 38K+ via the 40Ar(p, 3n)-Process

A novel way of producing 38K+ has been developed which enables a rapid, remote and effective production of 38K+ repeatedly via the 40Ar(p, 3n) process. An i.v. injectable solution of 610±30 MBq 38K+ was obtained in 2.2±0.4 min from EOB with a specific activity of 690±140 GBq/μmol and a radionuclidic purity of >99.9%, by irradiating natural argon gas (20 bar, 150 mm thick) with 40 MeV protons (39.2 MeV on target) at 6–6.5 μA for 15 min.