De
Project 12,1 - Threshold Detectors - \!, Eiccers
Project 12.1 exposed Zirconium senples
what we believe to be a totel of
(frie).
‘Wwe observed
neutrons above 12 mev
esczping the device,
‘a mixed with the gas, one has the
following muterials ané their respective amounts in the centr+1 regions
four
TeeST
Ue are confined to « sphere whese racius is fe
ME
he sect sston
neutrons avove 12 mev.
Tne remainine miterizls and their thickness in free paths are:
et
The transmission of these materials is ne
wae eee,
.
.
ert >
4
Cop
tan2/006
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