Asavergrpyy £: Bete i ae at wer oe he Ne EstimationofPatio of Surface PetaDosePate to GamnaDose Rate at Four inchesfron.anObjectIvoInches in Onc may aszume a retis of beta cote rave (07 wee/con® Gouth of ghint to prema dese vate (4bhres foot cbove the g.ovid) of 1265/1, Tia emntene dreted object cf say two inch retius viva iecoved (or shiclecd) fron a ganeral radiation field the gamma dose rate at four inches from the surface might be some 40 times less than from an infinite plans with the geome decrees of contemination (appsndix D), vhile the bets dota rate night + renstin almost the seme valuc if the oljcct is in contact wita the siin. be Thus, the beta to gamma doz: rates menace] unter these corditdeas ahi be 5000/1, Tor other than 2 plane survees, the enzma dose 1.143 might be higher, thus reducing this ratio. ro Se ee en + ORE Nm YET Re rem mp “+