a ee te ta re te NRL REPORT 6374 TaBLe Al Radioactive Decay of Radon Descendants on a Filter Following a 20-min Collection During Which the Radon Conglomerate Progressively Increased in Age* ted in ner radon Counting Interval rowth affect (min) t sig- F the dard , RaC Age 0-20 min; ‘lods for RaB Interval * | RaA (min) RaB RaC Age 80-100 min; p = 0.564 to 0.623 p = 9.0 to 0.190 roce- en. RaA Radioactive Decavs Counting Radioactive Decays 0-1 Sample Manipulation 1-6 2296} 4112] 3775 2069 6-11 745 |14109 16380 11-16 230 3370; 2311 11-16 939 112454 15874 25 7 9640 8474 14223 13533 6-11 715 1-6 2316 |15867 16655 21-26 26-31 24 7 2977] 2622 2307 2504 2498 21-26 26-31 1e5 31-36 3 2027 2443 31-36 3 7431 12630 ed 36-41 1 1782 2353 36-41 I 6544 11717 lis 41-46 O 1566 2244 41-46 O 5753 10814 re 46-51 O{ 1375 2119 46-51 0 5057 9938 te 51-56 0} 1209 i983 51-56 ) 4443 9101 ig 56-61 0 1063 1847 56-61 Q 3904 8301 if 61-66 0 934 1707 61-66 QO 3432 7552 _ 66-71 0 $21 1576 66-71 0 3017 6851 : J 2450 Sample Manipulation 74 are pP 16-21 1709 0-1 Age 40-60 min; 16-21 77 |10962 15196 Age © (secular equiltbrium); p = 0.355 to 0.478 p = 0.735 0-1 Sample Manipulation 0-1 Sample Manipulation 1-6 2316 112780 6-11 11-16 745 239 111397 10069 10802 1-6 2316 [17594 21219 11006 10960 6-11 [1-16 745 239 115627 113788 20470 19533 16-21 77 8866 [10715 16-21 77 (12134 18467 21-26 26-31 31-36 36-41 41-46 46-51 51-56 56-61 25 7 3 ¥ O oO 0 07; 7798 6855 6025 5295 4654 4090 3594 3158 |10325 9839 9285 8699 8094 7491 6900 6329 21-26 26-31 31-36 36-41 41-46 46-51 51-56 56-6] 25 7 3 1 0 0 0 QO 110670 9379 8245 7245 6367 5594 4916 4321 17320 16136 14950 13782 12654 11572 10551 9589 61-66 QO 2776 5785 61-66 0 3798 8696 66-71 0 2440 5272 66-71 0 3338 7866 *Based on sampling of 100 pCi of radon per unit volume in various stages of equilibrium with its descendants.