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.