Table 5.
Percent Contribution of Fission Products to Total A-Activity in Plankton
Collected June 1956 on the Walton and Analyzed July 30 and August 29, 1956
(Values as of date of analysis)
Sample
.
mnL490 Ceri Trivalent
number Zr?? Rh
rare earths Total
Insolubie(5) Soluble}°}
in HNO3
residue‘'’
d/n/g
of wet
Total plankton
1E (1) 12
15
4.8
27
20
79
11
(3}
-
~
1,800
up (1)
0
33
45
23
22
82
13.
(3)
5.1
100
12,200
BA (1)
5.5
17
2.2
20
25
70
15
=(3)
4.3
89
11,700
9D (1) 10
21
1.1
20
17
69
12
»=(3)
2.1
83
158,000
3a (2)
12
28
25
82
8.4 (4)
15
105
882
6.2 (4)
10
100
6,740
( 4)
12
101
3,680
56
5.7 (4)
14
76
56, 400
70
8.4 (4)
21
99
12,100
8.9
<8
TD (2) 12
19
2.5
34
17
84
9A (2) 11
18
2.4
32
15
78
gc (2)
12
0.6
25
16
1.7
29
8.9
10B (2) 11
9.5
12
11
No measurable vadiostrontium or radioceslum were found.
1) analyses of July 30, 1956.
2)
3
2
7
Analyses of August 29, 1956.
Residue insoluble in HNO,
after dry ashing at 600°C.
Residue after wet ashing with ciN
and HoQ5
6
Gamma ray spectrograph Pndicates this wae "2 “mixture of cel Ht. pelts 21, RytO3+106 2,10
Residual solution after completion of analyses.
dangBYoPPCSTTBETA,
indicates this solution was a mixture of Ce
1A palit 795°
Bt
Ce 141