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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
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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.
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