4_4NBUDs Yes. You have a pretty good counting geometry, maybe 30%? It's « little better than that, we have @ very good " which gives, vell, 45%. Wecount to 640 count nov, but ‘Usd@’to count to 20 sinutes, but we didn't get 640 coun 20 ninztes, Merrill, how do you calculate your total beta meg SCOVILLE? your disintegretions per mimite per square foot. That lead to considerable error, He didn't do this, I aid, HILL: Well this is a good point, because we are counting in om to expedite the large muber of samples ve hanile each & Be seal these senples into polyvinyl strips on tapes, ar And your vindovt? The window is negligible, it's of the order of 1.5 1 EISENBUDs or 1.7. LISBYs So we are getting some sbscrption of soft t This is particularly serious on the Ivy drift as you cs there is a longer life involved. These are softer. What we hed hoped was that our accounting methods which systems which wore selected on the basis of expediency t Department of FEnerey Hest -7 f a Ld ry ve.