if Pare ee rat : ae) se ran ae oo - isane Kat o3, pests fs rac aay ; us Ne , Gi C % : wt 305 S. HISAMATSU and M. SAKANOQUE Bikini ash } F3IOS (46. 3hr) {St.Ohr} T3IO9 (44.4 br) ooh q 100 a 100} ca menge | i ! spat 3 3 2 bo U { ! Pustandord soll {46.9 hr) Levey et L . 73IOS (49.7hr) | settleae! , Vel’ | \ 73H3 (47.6 hr) 100} \ 5.15 MeV 5.17 MeV f } 236py, 5.77 Mev lOO + 2355), r H \ | \ .5OMev | saa ll l 100 f \ ( «ads uel pl, aeeA ata. (a) é hw i ; 4 “ . et oe ot . Bikini ash (25.3 hr) | ae 7SIO8 (47 Ihr) d a \ wade wy ..! 4 '*8G¢ | 244 Am 3.18MeV | 5.49Mev | 100 73I09 (49 0 hr) 73tO5 | 100 100 | bk ow J 3 _ 4 5 io} Lanes: & MeV LA fe m . . a0 moa 5 x ‘ an jew tole oO a I: ie BO w wo Slayer Mf a a DR GER Ww wD 2 us ooM \/ aA G v8] 7 . Mev (9) Fic. 4a. Alpha spectra of plutonium Fraction from “Bikini Ash" samplo and marine sediment samples. b. Alpha spectra of americnimfraction from “BikiniAsh” sample and —< P) [3 hon = marine sediment samples. Fi . fybocsae SS G f | ‘ hy canbe ft a cobs i. ar = 4 lL " 73I13 High energy region (74,4 hr) ~ o c oe o 73li3 (68.4 hr) 100 (49. Bh) I anvearere = /\ ! | nt. i oS o i | vy era IP Yas BE CRT vid ee mole dee Fey Paes MGswo Ler oes . A ”, ~ ¢ ae. my, ‘ 4