VENT
ANT
relationship to the surface qose and depth close
as does the air dose measured iia “pont scarce
beam in the elime or laberatory.
b
DRS RTP EO GN
© X POSED GROUPS
mtg Pte ope
re Pet
Wollics
[:
fee
gf
PER CENT AIR DOSE AT SURFACE
Lee H.
-- = 4
oe
zor
cutk, Grroup PV oo. lle ee
wor
oe ce
ee
ve
100
~
oo
.
—
—
260 9
0.2222)
Rongertk, (rroup PLD
hat the miucdline cose,
rather than dose measured ioaie. waadd de the
100
enim air doses with comparable bio-
etfect ire Gbtaamed :
Ronyelup. (rroup To. -Lilingraae, Grroup [IL-2
appear under these cirewistam es and in riost
experimental conditions
9
cee
yo
({
am
:
dee
477 EXPOSURE,
MANY SOURCES
35
arn
6
BILATERAL EXPOSURE,
DIVERGING SOURCE
39%
7
XN
“
|
1g
thin
9
se
5
10
i$
20
|
4
23
30
tf
~
™
36
CM MASON! EF
DEPTH DOSE DISTRIBUTION IN CYLINORICAL PHANTOM, co FACILITY, (NMR 1}
FIGURE j.¢—'omtpariwon of depth
foe onrpes in maroniuec
Milatera: erposure tu a vingle powd saucre.
ninitipl:
eoureos Uith a wpRherions
better common pariumete! i fermis of whieh t
predict biological «ect. (op fais assumption
the air dose values -tated in Table 1... stroula tye
multiphed by approxwm: LEeTV oc. 1b order ot
compare their effects 1 those of a given air
dose from a “point sour o beam eometry Ge
livered dilateraily. If ais os ddone. assume
wu
fallout of
Ie
381712 O a6
Hours.
he
fe Tow mer
ot pean
phantoms from
mad ximultaneous exposure to
fuattr ation aretnd the phantom.
Poe seometry of radiation from a fallout held
not jdenrical either to the geometry of bicateral point sources or spherically distributed
«curves since the plane source delivers the radiaerazing angle. However, the
varge dy ato mit
tetal iesd situation is better approximated by
4fothuaby pline geometry. lxposure geomrs.)
pu diouetive cloud would be spherical.
hon