Details

Autor(en) / Beteiligte

• Pöllänen, R.
• Siiskonen, T.
• Ihantola, S.
• Toivonen, H.
• Pelikan, A.
• Inn, K.
• La Rosa, J.
• Bene, B.J.

Titel

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

Ist Teil von

• Applied radiation and isotopes, 2012-04, Vol.70 (4), p.733-739

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2012

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A novel analysis program to unfold alpha-particle energy spectra was introduced, demonstrated and validated using radiochemically processed test sources, which contained different amounts of 239Pu and 240Pu. A high-resolution alpha spectrometer was used for data acquisition. The software known as ADAM unfolds the spectra using nuclide-specific decay data as a constraint. The peaks can have different shapes and the software can also cope with the coincidences between alpha particles and electrons/photons. In the present paper, the 239Pu/240Pu activity ratios from alpha spectrometry agreed, within the stated uncertainties, with the reference values. Number of counts in the 239,240Pu peak group must be larger than 100 to obtain reliable values when using semiconductor detector of energy resolution FWHM=10.6keV. ► 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.