Analysis of information sources in references of the Wikipedia article "Nettunio" in Italian language version.
«Fission foils are commonly used as dosimetry sensors. […] 235U, 238U, 239Pu, and 237Np are the most commonly used fissionable/fissile dosimetry materials. […] 237Np is the most important for spectrum adjustment in that it provides a significant part of its response in the 100 keV to 1 MeV region where few other dosimetry sensors are practical.»