- 16 particle irradiation of deep respiratory tissue?,
The
last two columns in Table III describe the radiation field
around such a particle 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 desending on whether one averages the dose over
the entire lung or calculates it on the basis of the tissue
exposed.
Radiation Dose Rate Due to a Pu-239 Particl
tv
TABLE ,III
(1 u in diameter, 0.28 pci?)
Soft
. Tissue
24
Irradiated
Mass of
Tissue
Entire
Orcan
99
Lung
Tissue
5
Irradiated
Clissest
6
20 Alveoli
0.4 ug
1000 g
65 ug
19 ug
735,000
0.0003
4000
11,000
Dose Rate
(ren/yr)
21/
Geesaman, Donald P., 2. Amalvsis of the Carcinocenic Risk
from an tUnsoluble Rlona-Enicting Aerosol Senosited in Dees
Rasoiratory Tissue,
CCRL-50337
trance Livermore Laboratory,
and
UCRL-50387
Addendun,
Livermore, Calit.,
1963.