101
en
—
gamma radiation.
Yor this reason we
introduce the use of BFy and Graphite Chambers,
The BF3 Chamber has a six centi~
meter polyethylene moderator, the purpose of
moderating the incoming fast neutrons and
enhancing the response of this chamber to
neutron Badiation; the Graphite Chamber
hae a negligible neutron response so that
the two of them oan be used for the purpose
of measuring the gamma dose rate and the
neutron dose rate,
’
fhe relative response of the BF
Chamber to neutron radiation is an orier of
magnitude greater than that due to the
Tissue Equivalent Chember,
And so, this
improves the reaolution as it were,
The response of the Tissue Equie
<
valent Chamber except for possible variations
of the dose delivered in the human body from
multiple neutron collisions as opposed to
single collision is essentially flat with
respect to energy,
The flux required to produce a -
millirem per hour at 500 KEV may be ten
times, or rather three times that required
at ten MEV, but nonethelese, the energy