Analysis of plutonium isotope ratios including
Pu/
Pu in individual U-Pu mixed oxide particles by means of a combination of alpha spectrometry and ICP-MS
Esaka, Fumitaka
; Yasuda, Kenichiro
; Suzuki, Daisuke
; Miyamoto, Yutaka
; Magara, Masaaki

The isotope ratios of
Pu/
Pu,
Pu/
Pu,
Pu/
Pu, and
Pu/
Pu were measured for individual Pu and U-Pu mixed oxide particles by a combination of alpha spectrometry and inductively coupled plasma mass spectrometry (ICP-MS). As a consequence, we were able to determine the
Pu/
Pu,
Pu/
Pu, and
Pu/
Pu isotope ratios with ICP-MS after particle dissolution and chemical separation of uranium, plutonium and americium with UTEVA resins. Furthermore,
Pu/
Pu isotope ratios were able to be calculated by using both the
Pu/(
Pu+
Pu) activity ratios that had been measured through alpha spectrometry and the
Pu/
Pu isotope ratios determined through ICP-MS. Therefore, the combined use of alpha spectrometry and ICP-MS is useful in determining plutonium isotope ratios, including
Pu/
Pu, in individual U-Pu mixed oxide particles.