4) The assumption that has to be made for the teeth experiment is needed in the extrapolation from animal data, e.y., distribution of Pu in teeth samples of animals - distribution of Pu in teeth samples of humans. 5) Calculalions lo show plausibility of autoradiography on the MI samples: Tooth specific gravity: (ICRP 23 Reference Man): weight: Ll pm average activity concentration: 200 £Ci/gm 2.09 g/cm 3 200 £Ci/ym x 2.09 g/em> x 1 gm = 418 £Ci/em? leu Ll slice be 10 pm tl 418 ECi/em? x LO ym x 1074 em/ym = 0.418 £Cifem* 0.000928 dpm/em* Since A = AN A/xX = N 900928dpm/cm 0.693 2 24,360x5.25x10° min =N 1.71 x 10! atoms = N in 1 em Note: 1 in a million Pu. emits lu/wk One week: 17.1 a tracks/cm2 detectable) Possible interference from other a emitters: Uranium to Plutonium ratio 1 to 100; Thorium to Plutonlum 1 to 30, however, the Th a's are much lower in energy. JO095b4