Jim Lux wrote: ...
makes an interesting point that a number calculated back in the 60s (orders of magnitude too high) has achieved urban legend status.
The correlations I was mentioning were for amateur measured fluxes while flying at about 40,000 ft. One thing worth mentioning is that all methods of measuring radioactive fluxes are not equal. The ubiquitous G-M tube is made in a myriad of different configurations whose abilities range from measuring only very hard gamma rays to softish Xrays in the 10KeV range. And some G-M tubes have capability of making very misleading measurements of alpha and beta particles in addition to gamma. And then there is the scintillation type of meter, which uses a material that fluoresces on exposure to whatever particle, or energy level, that is interesting to its maker. I have measured numerous sources using a variety of different G-M tubes and scintillation counters, and the "differences of opinion" the different counters have is rather wide. My Victoreen 425-110, made for 10KeV gamma and above, but not beta or alpha is a real ninny, and thinks everything is drastically hot... But then it was made for use by the medical community in their nuclear medicine and x-ray exposure tests... My various PDR-27's, on the other hand, aren't too impressed with much of anything. Kind of what you might expect from counters that were meant for use by military folk that had to go into suspicious areas regardless of the risk. I'm not sure what sort of G-M counters were being used for TVB's test, and for the others that have shown up on the web... It is probable that the users of these counters were not all that sure themselves. I am pretty sure, however, that this branch of TVB's thread has left the cover of the time-nuts charter... -Chuck Harris _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
