Determination of 239Pu/240Pu isotopic ratio by high-resolution alpha-particle spectrometry using the ADAM program

► Correct determination of 239Pu/240Pu isotopic ratio is possible using high-resolution alpha spectrometry. ► A novel program known as ADAM was developed for spectrum unfolding. ► The program can take into account alpha-electron/photon coincidences and different peak shapes.