10%p
T
T
T
1
T
T
T
7
T
T
7
T
~
i
=|
i
—_
5 iS
4
a
—
ny
7
4
4
“
Es
a
eri
; 8iN
8
oN
.
\
ACTIVITY, C/M
eg ~
T
T
T
T
5
4
=
—
:-
Le
.
L
.
=
_
a
~
a
1
C
~
4
oe |
i
|
e
°N
’
r\
|
8
7
ibwe
~
Ne
NN
at
C
T
—
° Ce
\
+
\
»
5
T
28
4
On
.
T
°
:
5
Lamar
T
4
es ~we Ru
tah,
IO
T
a
f
oe ON
T
5
;
—
.
N
gore EARTHS
=
~,
.
>
“
.
—anavt
—
Lene
—
x
bone
7
.
BACKGROUND
to
\
©
{4
{4
es
|
100 200 300 400 500 600 700 800 900 1000 1100 1200 1300
»
9-—s«:
3
1
a
}
I
100 200 300 400 500 600 700 8009001000 1100
ADDED Al ABSORBER, MG/CM*
Figure 15.
\
Mass absorption curves of radiochemically-separated fractions of Rojoa
dredged sand