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Grundstof<br />

Gruppe 2<br />

(høj radiotoksicitet)<br />

18<br />

Radionuklid<br />

Gruppe 3<br />

(middel radiotoksicitet)<br />

Gruppe 4<br />

(lav radiotoksicitet)<br />

Ce Ce-144+ Ce-139, Ce-141,<br />

Ce-143<br />

Pr Pr-142, Pr-143<br />

Nd Nd-147 Nd-149<br />

Pm Pm-147, Pm-149<br />

Sm Sm-151, Sm-153<br />

Eu Eu-152, Eu-154,<br />

Eu-155<br />

Eu-152m<br />

Gd Gd-153, Gd-159<br />

Tb Tb-160<br />

Dy Dy-166 Dy-165<br />

Ho Ho-166<br />

Er Er-169, Er-171<br />

Tm Tm-170, Tm-171<br />

Yb Yb-175<br />

Lu Lu-177<br />

Hf Hf-181<br />

Ta Ta-182<br />

W W-185, W-187 W-181<br />

Re Re-186, Re-188<br />

Os Os-185, Os-191,<br />

Os-193<br />

Os-191m<br />

Ir Ir-190 Ir-192,<br />

Ir-194<br />

Pt Pt-191, Pt-193m,<br />

Pt-197<br />

Pt-197m<br />

Au Au-198, Au-199<br />

Hg Hg-197, Hg-197m, Hg-<br />

203<br />

Tl Tl-200, Tl-202,<br />

Tl-204<br />

Tl-201

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