~9-
Self-absorption corrections for B
and spikes.
made for
counting were
5 per cent citrate dried on 1$-inch plates and in
some instances for 0.5 per cent oxalate plated and flamed on
These correction factors are as
the same size planchets.
follows:
Oxalate samples
Isotope
Correction factor
Anton
Fe-9s
ar ??-Nb9>
Rut6p,106
Methane gas-flow
8.3
1.54
15.4
5.6
1.54
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).
Citrate samples
Isotope
Correction factor
Anton
Methane gas-flow
Fe?
- 4i.g
0°?
11.6
2.8
gr9°9°
4.7
1.9
tr? cp?
18.8
C097 +58, 60
y
Rutgy}
13.1
5.4
-
3.2
3,2
2.0
3.2
6.0
2.2
cs'3?
6.2
2,2
cel tt p14
6.5
2.2
yp
It.
cea