Standard reference data on the characteristics of the ?-emitting radionuclides226Ra,233U,238Pu, and239Pu

An isotope dilution mass spectrometry overview: tips and applications for the measurement of radionuclides

“…241 Pu is a short-lived isotope (t 1/2 = 14.325 years 171 ) whose abundance can be correlated with that of its decay product 241 Am. 172 However, 238 Pu is generally measured by alpha spectrometry because of the non-negligible interference of 238 U at the same mass and its relatively short radioactive period (t 1/2 = 87.74 years 173 ). The spike commonly used for ID-MS is 242 Pu in water 163 and solid matrices, 172 but 244 Pu can also be chosen if 242 Pu is expected in the sample.…”