Table 1
Characteristics of various radioisotopes
Product
Half life (days)
Radiation
Mean soft tissue penetration (mm)
Gold-198
2.7
β and γ
1.2
Yttrium-90
2.7
β
3.6
Erbium-169
9.5
β
0.3
Rhenium-186
3.7
β and γ
1.2
Phosphorus-32
14.3
β
2.6