gamma radiation are shown.
.
first few millimeters
of
The coses of radiation to Che surfuce ang tie
the Loay were substantially higher
micline cuse of gamma radiation.
3 cn dose of
lesions
radiation.
Tie curves presented are a perceat of the
In addition,
forcefully aenonstratec
than the
tuat
the clinical observations ot
the duse
to
the
skin
Cie skin varies
considerably between fadgividuals anc over the surface of any wziven
{naividual because of
tie spotty nature of
tie
radiation burns
Another feacure of fallout radiation is its decay.
arrived aoout 4-5 nours after cGetonation.
continuously as
the
fallout material decayed.
dose was received at a higher dose rate.
nad been received,
skin.
The fallout
Figure 135 shows
of dose as a function of time after detonation.
to the
tne accumusacticn
The dose rate cecreased
The major pertioa of
the
By the time that 90% of the dase
the dose cate had falien
to
less
than 40% of
initial
value and thus is much different Irom any anital exposure condition in
literature.
the
The intluence ot a agse rate fallin, by a 1.2 Power tunction
‘is mot known.
Repaic of Radiation
Injury
This has been considered in some detail in a report of
the C.P dissertation,
ever one mouth,
it was stated
chat 150 rad aver ome werk, 2°) ras
oc 300 rad over four moutiis is
that no wedical care would te required.
550 rad over one month,
telieved
to te sublethel anu
However, 250 rad over ong wexk,
or 5009 rad over four months
is esti-:ated to &
a
the 5, iortality range and that seme medical care will be cequired.
450 rad
Is
longer,
tne mortality without
received over one Ween, GUY rad cr wore cover one montn or
trerapy is estinatead
extensive medical care will be
mot
micline
tissue
dose
in
resuired.
to be SU or sore ara
These are duses of
rad in wir an
rad.
whether studies on mice are applicable to man is not known.
In recent
unpublished stucies, we have investigated the influence ot waryizs the
interval from i~24 hours between 2.5 Gy, 250 «Y¥p x ray to mice, for a
of 10 Gy.
This is shown in Figure 14.
mice survive 30 days.
increased,
in
—
we en
tnere
fa.
In
the 1.Civ .37).
at intervals of 1 and 2 nours,
tire
total
no.
<As the faterval between the 2.5 Gy increments aie
is an apparent cyclic change in
the traction survivics.
when the interval is 22 or 24 nours between the 2.5 Gy increment, 100% of
toe mice
5007493
survive.
Figure
15 snows
tie hematovoietic stem cell
(CFUHs)
per