-9and spikes.
made for
Self-absorption corrections for
A
counting were
5 per cent citrate dried on 14-inch plates and in
some instances for 0.5 per cent oxalate plated and flamed on
the same size planchets.
These correction factors are as
follows:
I.
Oxalate samples
Isotope
Correction factor
Anton
FeoI#
Zr99-Nb??
Rut°o nO
Methane gas~flow
8.3
1.54
15.4
1.54
5.6
1.54
#fe-> was counted only in the methare gas-flow
chamber, A total correction factor of 4 was
used (based on 50 per cent geometry and an
assumed counting efficiency of 50 per cent).
II.
Citrate samples
Isotope
Correction factor
Anton
Methane gas-flow
Fe?
Co7+58,60
11.9
a3)
3.2
3.1
¢o°°
11.6
2.8
4.7
1.9
gr70-9?
y
ar? -Co??
Rudpnt
5.4
2.0
18.8
6
3.2
2.2
es 13!
6.2
2.2
cel 4ppt
6.5
2.2