96
This 18 a Scintillation Detector
using a five inch orystal and a five inch
photomultiplier based upon a Hornyak design and built in this laboratory,
Next slide, please?
Well, that is the end of it.
should just like to say what our general
I
overall impressions were with respect to the
thirty accelerators that we have visited and
that are more or less representative of 2C0
accelerators or so in the United States,
Ye do
not think that there are
large numbers of people being exposed ex=
cessively to high level fast neutrons, As
a matter of fact we think the problem is
quite the other way around,
At all accelerators where we maine
tained film badge’ records and have done
service, there's a great tendency for a very
small group of technically proficient people
at the accelerator site to receive the total
site exposure, that is, if there are eleven
people wearing film badges and technically
resvonsible for exnerimentation, one will
find two peorle heave received a total site
exposure over a period of a couple years.