Assuae: a. b. iosint source 0.5 Kev beta anergy e. ue 10 er*/an . é. ‘Rate of decay follous t@)+< The dose delivered af the surface of an iraginary sphere af distance RK from « point source.* (1) E(R) = Oy ome ** Pd grax where: K(R) @ dose delivered at the surface of an imaginary sphere at distance F ES average energy of beta particles C m total nuxber of disintagrations Substituting y: © 15ex?/ee Then: bBo e cB» > (2) K(k) 32,307 sghch he ax 6.25 te or 6.35 girdis integration =~ (3.a.) K(R) = mp x 19™ (3.b.) ' /) © wase absorption coefficient E(K) = Qe x yo76 wo 2 R« Disintegration “1 2 LOR. ke Bilbiress ; BlLlinegs te DOE/NY aisintegration Equation (3.e.) is plotted on the attached graph. Fol. PISSIGN PRODUCTS, \ (5) le ns ~1.2 a At where: 4, = Jisintegrations per unit tine at time "a" after detonation Ay ®@ diaintegrations per unit tice at one unit of tice after Siossi, Halle and Elite, Aall, "Distributed Beta cources in Uniformly absorbing Media" Nueleoniss July 1950, ¥. 7, Bo. 1 az Dish queiin : ot