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Subject: looking for help on determining dose rate of PuBe source



Hi,
I am looking for help on how to accurately determine the neutron dose rate outside of a PuBe  or AmBe neutron source box. The rectangular box walls are comprised of:

OUTSIDE WORLD
0.020 inches of cadmium
0.062 inches of steel
6.0 inches of paraffin
0.062 inches of steel
4.0 inches of air
PuBe source (5 Ci)

Any experiences, ideas or thoughts on said subject will be greatly appreciated.

Thanks in advance,
James Lynch
JLynch@istcorp.com