There are two types of sampling measurements taken as part of the on-going Radwatch environmental monitoring effort: basic gamma-counting to investigate the concentration of radioactive isotopes in the samples, and a more detailed investigation of the concentration of trace metals in the samples through neutron activation.
Gamma Radiation Analysis
The goal of the gamma counting analysis of environmental samples is to measure ambient concentrations of certain radioisotopes of interest. These radioisotopes included Cs-137, Cs-134, K-40, Bi-214, and Tl-208. Concentrations across a variety of samples are acquired and compared to each other and with reference samples.