Only the ythius. That is emmotially just the ythium. i ay BaTHR: Well, we took 2,000,000 volts maximum beta ray energy which, understand, is the ythius number and thet is about 600 kilovolts average energy, saybe it is 900, but I certainly von't argueaboge 50%. . Doesn't a good deal depend here on what you vant to use this figure for? The secepted perniasible body burden of 1 aicrocurie presumably has the eafety factor of ten, so if ve are attenpting to keep the average ioad of vody burden ef the population down te an abschute safe figure, shouldn't we stick to the 1 aicrecurie figure? If you have some other purpose in mind, then probably ten is more realistige then 1. BETHE: Well, 1 wanted to get a figure which could be compared to other figures, which ere commonly weed other than a figure which is taken more or less by arbitrary agreement. Well, there probably ia a safety factor of ten in the three hundred ar per week, too, ien't there? BUGEER: This is also supposed to be real safe. Three hundred ar per week is probably nat as firm a standard as one-tenth microgram of radium. That is one digure comparison--that is why we like in these internal exitters to go along the one-tenth microgram rediua standard rather than the gemma nuasbers. SETHE: How as far se a nonuniform distribution is concerned, I think you will be all right as soon as you talk about a level of strontium relative to calciua which is being absorbed rather than about total esount of strontium, and I think it is important to try to eliminate the cmmpounded aes DUE ARCHIVES