ary
made first, where the radiation field was 10 r/hr.
The cameras were
placed in the lead box and the truck driven to the 450 yd. station where
the radiation field was only 1 r/hr. and the cameras from this station
were then recovered.
|
The following day, development of the plates from two of the
cameras at the 300 yd. station and from one of the cameras at the 450
yd. station were started.
Each of tneigBR ecaceroor) camcras contained four plates with
C2 emulsions, all at rear positions.
Two plates with El emulsions
were placed at forward raised positions.
The C2 emilsions from the 300 yd. station look to be readable.
They cannot be analysed on the microscope that we have here (Parry
Island),
There is no water cell to cool the illuminating beam,
The
heat from the intense light beam required pits the emulsion.
Four hundred and eighteen tracks were measured on one of the C2
plates from the 450 yd. station by Glen Frye.
The results of this
analysis are shown in Table 12,2-1 and the neutron energy spectrum
extrapolated back to the outside of the bomb is shown in Fig. 12.21.
It should be emphasized that these data are preliminary.
At-
tention is called to the number of tracks recorijied for each half mev
energy interval as shown in the table,
We wish to thank J, Hill, R. Newman and R. Blossom for their
assistance in making last minute changes.
Also we would like to state
our appreciation of the cooperation which we have received from Buddy
Schutz and the other machinists.
- 36 =
AS
COPIED/DOE, 3
LANL RG ”. a