Beta radiation sources: Nickel-63 / Ni-63 with corrosion-resistant coating

Radionuclide characteristics
Half-life, days: 36962.51 ± 54.79
Beta particle energy:

βmax 66.945±0.005 keV (100%)
β 17.425±0.006 keV

Reference data:
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.

Planar (surface) sourcesylindrical sourcesDisk sources

Code Nominal
activity *
Typical ionization
current *, nA
D, mm d, mm
mCi MBq
88.8 2 20 16
666 18 8

* Tolerance: ±15%

Maximum practical surface activity load is ~ 9mCi/cm2

ISO classification: 43221

Corrosion-resistant Beta radiation sources are suitable for applications with temperatures up to +250 ° in aerial environment and under long-term exposure to moisture.

Recommended working life: 5 years in air atmosphere, 10 years in inert gas atmosphere. Storage in inert gas atmosphere is suggested when not in use.


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