- 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