ate ae Stee ie 4 Mite tee BD ey te : at Wee! ‘ te BaWe a CEade ; i aeeee PEALE rail algseiieaBashoar oe cleailae a s calities. arly eeper calities. e slopes OLive \ he decays for sea water are given in Table 6 and Figure 11. Counting errors were large because of the low levels of Jater counts. nearly 211 of the The contribution to the was compensated for by subtracting l radioactivity by from each count per minute per 5 milliliter plate. per minute per plate was equivalent to 3 d/m/plate, absorption was approximately 3. Table 6. Decay rates of sea water samples collected at Fniwetok Atoll in May, June,and July 1954, with corresponding decline rates from Table 1 for comparison. Data for Fig. 11. Locality Pilate Curve number numbers 1 Time span in Slope, negative days after 5/14/54, 7567-68 Belle, ocean side 2 3 4 7569-70 7575-76 7685-386 6 7 9793-94 Wide Passage 7572 Leroy plankton sta. 9 9795-96 5 8 9805-04 916i " j.“ “ " " * " " plankton station ocean side lagoon side " " " " 33-630 335-630 55-910 59-6350 100-500 100-300 55-940 The data of Table 6 for the Belle, 49-040 100-300 9 sea water decays are graphed in Figure ll. With the exception of at of Decay Decline, from Table 1 1.3 1.28 1.5 1.5 1.5 1.28 2.50 1.28 1-2 1.5 2.40 2.41 1.4 2.41 1.0 1.5 2,91 2.41 1000 ocean side (curves l, 2, The decay curves tend to level terminally, even after subtraction of the activity due to KU, FM a a gradual because of low early values, declines were steeper than decays. RADIOACTIVITY and 45 where decline was unusually W69_ 1435 because the correction factor for geometry, back scatter, and self decay slope r sea One count oF