gue GO. Tne average beta erergy is 0.5 wev. E, The gamma dose is neglizgitlie sorperec to the beta dose. G do At t dis Sis aX. 0613 - 1135 4.3 hrs 3 brs deli 1130 = L446 3.< hrs — 2.3% WUi5- 145 4.9 brs 11.5 brs LEAS = 2322 he hers 23% = 0635 #5635 © 1635 brs we 15. wi. 3.90 6.3 21.26 63x17 2.1 0.63 252% bre Ask x 107 1.50 0.5 7.5 bra 21.5 bre 1.4 x 107 0,087 0.02 12.0 hrs 31.5 brs bx 10 0,15 6.03 ®az cured Samrie Calculations Lm batghe? £6, 2 eZ Let: ty = 53 hour: DOE t, 2 22°4 hours (13 weeks) r 2 pe b= (5)(3 x 2.22 219% x 65)(3)Pe2 fyn0-2 & zreg~-F =Z44% 1° disintegrations from 3rd hour to 13th week. Accumet E ave Be @0.5 Mev (4.4 x 107) (0.8) (1.6 x 1076) (Se) (94 ) = 4.2 x 107 reps 42 mreys Total Lung Dose for 13 weeke: ee ~~ 125 mre:s i Me ee mae 79