Table 3. Levels and decay rates of beta radioactivity of Rongelap-Ailinginae plankton, 1954-1957 Plankton net Plate No. Atoll Island 8201 8202 8303 8239 8240 19005 Rongelap " " " " " Labaredj " " Kabelle " " ao nation inch 12 " " 6 20 6 or 20 of net 125 " " 74 173 ? ? ? Silk " ? ? ? 20 20 -- " 20 74 " " " Rongelap " Labaredj " Kabelle 20 6 20 6 20 6 173 74 173 74 173 74 19030 19031 19067 19068’ " " " =~"! Lukuen " Kabelle " 6 20 1 2 74 173 74 157 19070 " 2 157 " " 1 74 " " 19069 19071 es " Ailinginae te Rongelap " Mojiri- Enibuk 6 20 1 -- 173 74 Date of collect- inches ing” " " " " " " Labaredj " rial 19020 19024 19025 19026 19027 19028 19029 ae me ot wn Ae per " " " desig- 19006 19019 . Diam - Number Meshes Mate- eter " " " " " " " a " " Nylon " " " " " " " " " te " " " " " 3-26-54 " " 7-16-54 " 12-8-54 " 12-18-54 " 1-26-55 " 1-28-55 " 1-29-55 tt Dateof first counting Ash Wet to October | basis basis in wc/kg* first counting 30, 1957 1.08 1.32 1,27 1.32 1.33 5-11-54 83 " 2330 " 4000 8-11-54 68 " 46 -aed 140 2.1 2.7 -~ - 1-3-55 6.2 - 1.75 5,0 - 1.72 " " " 2-22-55 " " " " — 1 1-30-55 " " " 10-21-55 11-26-55 " " 10-22-55 " 10-23-55 " " First count Decay slope from date of " 168 168 104 10.4 -1,35%*%* 32 25 24 27 12 588 3.9 . 54 .95 . 93 ~41 1.8 - 1.73 1.68 1,72 1.56 1.55 1.61 37 95 6.4 6.9 1.5 4.4 20 .18 - 1.70 1.70 1.76 1.72 93 2.1 2.0 4.5 5. 8 .044 . 047 . 70 - - 1. 61 ,73*** - 1.38 - 1.58 4 . . é |