Electroplated Manufacturing Technique
These standards are used for the calibration of alpha, beta and wide area counters. EAB standards are typically disks and LDS standards are either large square or large rectangular standards. All sources are NIST traceable based on output or contained activity. NIST certification on contained activity is not available on some alpha and beta sources. The surface emission rate in 2pi is given on the certificate and is NIST traceable for most nuclides. Note that the emission rate for a given energy spectrum is a function of detector geometry, gas composition, pressure and material of construction, so that virtually every detector may have a different response. All electroplated sources are prepared +/-30% of nominal activity.