Prompt (n, gamma)-spectrometry is an on-line measurement technique for the
determination of characteristics of nuclei (atomic masses, cross sections,
level schemes, etc.) and the nondestructive investigation of the isotopic c
omposition (and, thus, of the element composition) of any sample.
This method is used at the PTB for the determination of the isotopic compos
ition of the silicon spheres within the scope of the Avogadro project.