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Argon-potassium · A = 42 generator
⁴²Ar → ⁴²K
Recorded
⁴²Ar to ⁴²K radionuclide generator pair. Parent and daughter both have mass number 42.
⁴²Ar decays by β⁻ to ⁴²K, and ⁴²K decays to stable ⁴²Ca. NNDC prints the parent half-life as 32.9 y. The daughter half-life stays on the potassium-42 plate: 12.355 h. Parent and daughter both carry A = 42.
What it supports
One decay chain in which the parent and the daughter are both A = 42. It joins the argon-42, potassium-42, and calcium-42 plates. The parent figure on this dataset is 32.9 y, not a rounded 33.
What it does not
Not a hospital generator in the molybdenum-technetium class. Not a claim that this NNDC page prints the daughter half-life. Not a rounded half-life. Not Adams.
ExactnessExact
Form42
UnitA
Strengthhard
Hung24 September 2026