TABLE £ Gamma-Ray Enitting Pellout Radlosetivily on the Ground at Argonne Netional Laboratory in mo mh® Lsotope May ZrMuNb®* 180 L957 July” Ostober April Sept. March April 1959 May June _— July August 195 230 200 «9535 73L 3 37 We 6B 1280-135 UU 92 Cgi3? 35 Ryle Rut 178 175 180 180 R00 gel! Mio «120 ho 6 Ces 2ho 260 27% 250 Totala** 1095 116) + 1958 duly 170-180 -2LO 130358 980 1043? 756 6oh 332 812 881 230 186 1273 1202 120 84 80 Boo «329 268 «R213 270 Wi27 450 18330 Loh L81e 13321055 44S i322 hese koe sos si6o he79 1 #2215 __ oe Soll collected 40 miles from the Argonne site gave essentially the sama regulte ag the ANL colle, indicating thst * 2 “ e + any contamination from the reactors at Argonne ig of secondary importance in this study, 4 Assuming Zr 959?to ba in equilibrium, S ‘ . * * : . = wotals inelude activity due to both Ze’? and Wo”? , i.@ May 1957 360 me fm from these two isotopes, . "3 2

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