-10The disintegration rates of Mn? and zn? were determined
entirely by
than one
7
7Y
counting.
Also, in those instances where more
-emitting isotope was present in a fraction,
the
disintegration rate for each isotope was calculated from the
7
spectrum, back-calculated to c/m
with the observed
fA -count rate.
calculated and observed
£8
BP , totaled, and compared
The difference between the
count was rarely greater than 10
per cent and was usually 5 per cent or less.
The radiochemical separations for the fission products and
for Fe? and Fe? were made according to the methods outlined by
Kleinberg (1954) of the Los Alamos Selentific Laboratory.
The
methods for Mn, zn, and vanadium were taken from the procedures developed at the University of California Radiation
Laboratory (Meinke, 1949).
The determinations for cobalt were
made according to two different methods:
one was taken from
Kleinberg and the other from Hillebrand and Lundell (1953).