Beta radiation sources: Nickel-63 / Ni-63 with corrosion-resistant coating
Half-life, days: 36962.51 ± 54.79
Beta particle energy:
66.945±0.005 keV (100%)
Nuclear Data Sheets 92, 147 (2001)
63Ni is electrically deposited on a rectangular or round non-radioactive nickel backing 0.1 mm thick and covered with a corrosion-resistant layer. Sources are characterized by ionization current measured in a flat free-air ionization chamber.
Radius of a cylindrical source couldn’t be lower than L/2π, L – source length. Ionization current for cylindrical sources is measured before rolling.