- 16 particle irradiation of deep respiratory tissue--.
The
last two columns in Table III describe the radiation field
around such a particla in the lung using Geesaman's lung
model.
The dose rate to the entire organ is given in
column 2 of Table III for comparison.
From Table III it is
Significant to note that with an assumed DF=1, the lung
dose from the same particle varies by more than 8 orders of
magnitude depending on whether one averages the dose over
the entire lung or calculates it on the basis of the tissue
exposed.
Radiation Dose
ITI
Rate Due
~~
TABLE
to a Pu-229
Particle
(1 u in diameter, 0.28 pci??)
a,
:
Scit
Tissue 34
Irradiated
Lung
Entire
Organ
Tissue
Irradiated
Closest
20 Alveoli
730,000
0.0003
7
65 ug
.
19 ug
4000
11,000
21/ Geesaman, Donald P., An Analysis of the Carcinoaenic Risk
from an Insoluble Alpha-Emitting Aerosol Deposited in Deep
Respiratory Tissue, UCRL-50387 and UCRL-50387 Addendum,
Lawrence Livermore Laboratory,
Livermore,
Calif.,
1968.
..
eee ge Mp eto Ra
ce mrpAt
TRIMERae A Oat
es
ee
Rly“tia.
cee* OO
ryt
fos
vt a
sot
+o
’
wo
opg™
‘
dake
ah
.
Wt,
cd
tee rs
boo Ts
tease.
wt
Te
ie
ee
ee Nas
atl
Ae
ar
esa
(rem/yr)
1000 g?
rn
Dose Rate
0.4 ug
ro
Mass of
Tissue
e
r