apprinrx & LATIONS Of Beta Tose Rate at Popth of Seven Killigrams per _ ~Square Centizeter From a Thin Jourtt, ” 5 Assumes 1.5 Mev 7eta (Mean energ; = 0.5 Rev) F,= 10 en?/em (Tis sesmes & single mass acsorption coefficient.) I= Bo oe}* wheres Bo = numer of tetas at surface per cx? per sec. Hoe © 8 © ¢epth x Fe mass @porption coefficient x= distance (depth) under consideration di =7= | F ho o* . R@ pkoe"<r 2 were: R= dose rate at dept. X Fm mean encrgy of ‘etas , n= (10)o en (065) © 2.33 Bo Hev/gn~sec. Ho = 3.7 x 1 were: C = activity in elerocurles per oF R= 8,65 x 104 Rev/cr-sec. Be (1,39 x 10-1)(C)erzs/em-see = 5.k C reps/Ay or @&5.0C renal) & ‘le Agsme: C= 80 pe/ce® R=5.h6 = (55h )(80) or = (beta) where: Re Gate ratetp een 7 ne/om® in reps c== activity/cn?"in pe r = 100 rata/ar Cormarison eta Nose Rate(Peps/cr)at 7 Er/ex Ca-maLose Rate Keasured tn Infirite Fiela at a ree “ Feet Aovethe’ Surface© oe eee a Asse: PusUEtf rn = 80yefen® (seta), equivalent to 1 megacurie/nt? (¢acs) L32 ~ 100 “ar on. 9" CR