C)
)
2.
Visible Radietion
(very strong in ultraviolet)
50 suns for .002 seconds at 10,000 yds
2 suns between .02 and 1 second
2/t (minutes) suns thereafter
Heating
Pine
_e
d
400° at 1850 yards (charring)
100° at 2700 yards
Metal heats 1/30 as much as the pine and only melts in
ball of fire.
If skin and tissue resemble pine wood, it will char at
1550 yards and produce physiological damage.
Gamma Radiation
In the initial burst lasting one minute at a distance
R (yds):
€
*=stay
Roentgen units =
x 107 (9/500)
This amounts to 1000 Roentzens at 1000 yards or 44 Roentgen
at 1500 yards and drops rapidly the
ter,o5
The fission products produce fs x
ercomes
where t is the time after the explosion in hours. This
equation is valid after ons minute. In the first shot about
0.2% of the fission products will be distributed to a radius
of 1500 feet on the surface of water. The radioactivity at
the center and 3 feet above the water will be
t(hours
0.5
1
e
4
| Roentger/hour
143
53
13
7
After the second shot 5% of fission are uniformly distributed
in water in a cylinder of 1000' radius and 180' depth to give
& feet above water surface
Roentgen per hour = 62/t(hours)
The radioactive water moves at a velocity of 0.5 miles
per hour towards the west and will therefore soon move out
of the tarret area.
.
The activity in the center of cloud will be approxizately
Roentgen/hour = 720/t(hours)
assuming that the center of the cloud is at 40,000 ft and
occupies 10
activity of
activity of
on any ship
cubic miles after the first hour. The induced
the sea water is negligible (a few percent of |
deposited fission products). The induced activity
which remainsafloat will be nezlirible.