T.SLE ASQ
FERTILE T ATTE VetTign CcEFPICIE2
Tine
Alter
Fission
Average
Photon
—
—_Atr
Energy*, Mass**
E
Attenuation
Linear
Attenuation
Total Absorption Sonfficsents
Sa.t seater
teen+ OF
Mass **
Linear
Mass
Lanear
Attenuaticn Attenuation
Attenuation Attenuation
*
Nase
Attenuation
min
Mev;photon
cm@/g
en"?
cz?,'g
arct
on? /g
ent
ene /z
ert
L
1.212
0.058
6.7 x 16°?
0.063
6.064
0.05%
O.1-
O.0%
LAr we
5
4.146
0.059
6.8 x 1079
0.965
0.066
0.056
0.25
C.055
Lé x itt?
15
1.029
0.061
Tle 2079
0.069
c.970
6.069
0.26
0.062
LT let:
15
0.37%
4.063
T.3x10°9
0.071
0.973
2.062
9.36
0.063
Leb x ct?
29
0.346
0.065
7.5 x 10°9
0.072
0.078
0.063
o.17
6.063
hen ie
25
0.324
0.066
7.6x 10°93
9.073
0.078
2.066
0.17
3.066
Le
30
0.914
© .067
7.7 x 1079
0.CT~
0.076
0.065
0.27
2.087
1.9 ¥ wore
Average
1.02
7.2 x 1975
0.071
0.16
ox igre
get rte
# Valuss untescolated Sram data in Table ..1.
we Reference 35.
TABLE A.4
GEOMETRIC PARAMETERS OF CORACLE
See Figure A.1.
a.
b.
c.
d.
e.
f.
Radius
Height
Height
Height
Height
Radius
&b
Radius of coracle (maximum) + 4.5 feet.
Intersection with water surface of tangent to point of coracie rolloff = 12
feet. Average thickness of absorbing material along stated tangent
= 1 inch of fibergiass. Approximate linear attenuation [actor = 0.67.
Intersection with water surface of tangent to edge of aluminum case
= 8.3 feet. Average thickness of absorbing materials along stated
tangent = 46 inches of aluminum pius 0.5 inch of fiberglass. Approximate linear attenuation factor = 0.68.
Intersection with water surface of tangent to edge of Stvrafoam = 6.6 feet.
Average thickness of absorbing materials along stated tangent = 0.29
tach of aluminum plus 0.$ inch of fiberglass plus 12 inches of Sq rafoam.
Approximate linear attenuation factor = 0.69.
Radius at water line = 3.8 feet.
Draft (fully instrumented) = 14 inches.
of dome = 3.5 inches.
of dome = 18.0 inches.
of center of sensitive volume above deck = 14.7 inches.
of center of sensitive volume above water line = 4.06 feet.
of center of sensitive volume above keel = $.29 feet.
of flat coracle deck = 3.66 feet.
TABLE A.5
BUILDUP FACTORS FOR WATER
From Reference 37.
eee
yeux
Paths
ax
1
2
3
4
5
:
Buildup Factor*
0.28 Mew
0.3 Mes
J.u Mev
2. Mev
5.0 Mev
3.3
7.0
14.0
21.0
34.0
2.6
5.0
8.5
14.0
20.0
2.2
3.7
5.8
7.9
10.0
1.9
2.4
3.8
4.9
6.0
17
4
3.2
4.0
4.7
0.37
0.13
0.05
0.02
9.01
* Approximate expressions for buildup factor B with estimation of
the validity:
Average Photon Energy:
Expressiom=
Validity
0.25 Mev
0.5 Mev
Bs (1+ 4.2yx)
B= (1+ 2.6yx)
Poor
Poor
1.0 Mev
Be {1+ 1.Sux
Fair
20 Mev
Bs (1+ 0.9yx)
Good
3.0 Mev
B= 1+ 0.72ux)
Good
Qs
350
a)