Cf 252 Activity Calculator for PTI sources

The following calculator returns the decayed activity of three Cf-252 neutron sources, at the date specified. The initial activity and calibration dates are shown below. The half-life is 2.645 years.

Cf-252 Decay Correction

Source 1 (DHS-N): reference activity 41,707 neutrons/s on 01/22/2007

Source 2 (FTC-CF-Z450): reference activity 3,234,267 neutrons/s on 02/21/2002

Source 3: (FTC-CF-Z1861): reference activity 13,926,160 neutrons/s on 11/17/2008

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