89Sr data

Figure 11. Correlation of the 132Te with 89Sr data reported by Laboratory B...

The isotopic data can be used to calculate the partitioning. In the calculation the subscript 0 indicates original amount formed, 1 indicates extreme close-in fallout population, 2 indicates the total aerial cloud population. To resolve a three-component system, it is necessary to use three isotopes. 140Ba, 89Sr, and 147Nd are used in this illustration. Other isotope sets may be used providing only that their relative abundance... 

Figure 1. Correlation of 89Sr and 137Cs data reported by Laboratory A...

All of the data were plotted on log-log paper along with the correlation lines as given by the parameters from the computer-fitting routine. Figure 1 shows the results for 137Cs and 89Sr, which illustrate a reasonably satisfactory fit. Much of the data do not fit a linear log-log correlation line this well. Figure 2, for example, shows part of the results for "Sr. 

C, determined only 89Sr, 90Sr, 91Y, and 95Zr. The samples supplied to them were the same kind supplied to Laboratories A and B and should have shown the same fractionation behavior. It is unfortunate that there is no way of verifying the reliability of the 95Zr data from Laboratory C,... 

Storm of Jan. 20-23, 1967. This storm was characterized by the large (<— 200 kilotons) atmospheric nuclear weapon test of the Chinese (China-5) on Dec. 28, 1966. The pertinent ratio data are given in Table X. The first California storm occurred 25.6 days later. Another possible source of fresh fission products was the reported venting of a U.S.S.R. underground nuclear detonation on Dec. 18, 1966 (17). The prior Chinese and French atmosphere tests occurred 85 to 109 days before the storm date less than 1% of the 140Ba could have come from China-4 and less than 7% from the French tests. 89Sr was still present from the prior tests only 3% was left from the China-3 test of May 9, but the activity levels would still be measurable. 

Data Table 13.1 Data 89Sr, 90Sr, and 90Y count rates... 

Sr on the basis of the 90Y ingrowth. Count the two filters with 89Sr to calculate the counting efficiency and observe the radioactive decay of the radionuclide. Record the gross count rates and background count rate in Data Table 13.4. 

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