sae.
91
obtained by the slides which we will have
run off for us shortly.
This ehows the nucleus of our
neutron instrumentation,
To your left
you see a FaillaeRosel Tissue Equivalent
Chamber; to your right you see a carbon
dioxide filled graphite walled Lonization
chanber surrounded by aluminum and down
below ~-- this is the Tissue Equivalent
Chamber and thie is the carbon dioxide
filled graphite chamber,
(Indicating)
These devices are used in cone
junction with vibrating electrometers,
This is a BF~3 long counter, a device for
measuring specifically neutrons between
thermal and roughly up to three with a
flat flux kind of responce,
This particular vhotograph was
teken at the large proton "lineal" accele
erator at the University of Minnesota at
that time operating at forty MEV and they
are going to have it back to their full
capacity of sixty-eight NEV.
Can I have the next slide, please.
This represents one of the practical problem