4 wre rE 48 TATLE 7. Alpha Particle Energies (MeV) and Per Cent Decay Abundances ( > .5%) for the Observed Radioisotopes of Plutonium, Uranium and Polonium. PE RES og, Energy and . Isotope Energy and abundance Isotope abundance 236py 5.77 (63%) 232 238, 5.50 (72%) 234y 4.77 (72%) 2352p 5.16 (73.3%) 235y 4.60 (4.6%) 240by 20896 21054 5.72 (31%) 5.46 (28%) 5.14 (15.1%) 5.17 (11.5%) 5.32 (687) 5.27 (32% 4.72 (28%) 4.56 4.50 4.45 4.42 (3.7%) (1.2%) (0.6%)* (4.0%)* 4.40 (57%)* 5.17 (76%) 5.12 (24%) 5.11 (100%) 5.31 (100%) 238y 4.37 4.34 4.32 4.27 4.22 4.16 (18%)* (1.5%)* (3.0%)* (0.6%) (5.7%) (0.5%) 4.20 (77%) 4.15 (23%) * The peak width taken for computing the concentration of 235y in the spectra included the alpha particles emitted with these energies (84.1% of the decays). decontamination factors are reported for the removal of Cm and Cf (Butler, 1925), using the TIOA separation procedures. Although Berkelium is unusual among the transamericium actinides in that it can exist in the 4+ oxidation State (and therefore may not be separated from plutonium and uranium), it can not exist in the 4+ state in an 8 M HNO3 -Ho0. solution as was used to maintain the oxidation states of Pu (VI) in the initial extraction step of the TIOA Procedure (keller, op. cit.; p. 556). Additionally, because Pu (111) is not absorbed on anion exchange resin (Andelman and Rozzell, 1968), it can be essumed that these procedures provide for the removal of Berkelium similarly to that shown for the removal of the other trivalent actinides Pu, Am, Cm and Cf.