Back to Catalog
Medical · PET / SPECTNovel
Zr
40
89
Zirconium-89
A long-lived positron emitter (β⁺, 3.3 days) matched to the slow kinetics of monoclonal antibodies — the standard isotope for immuno-PET imaging.
t½ 3.3 daysPositron Emission (β⁺)
40 e⁻5 shells
Atomic Structure
40
Protons
49
Neutrons
K2 e⁻
L8 e⁻
M18 e⁻
N10 e⁻
O2 e⁻
Applications
- Immuno-PET imaging
- Antibody biodistribution tracking
- Theranostic patient selection
- Drug development trials
Production
Reaction
⁸⁹Y(p,n)⁸⁹Zr
Target
Yttrium-89
Source
16 MeV Cyclotron
16 MeV CyclotronYes
30 MeV CyclotronYes
70 MeV CyclotronYes
Nuclear ReactorNo
Threshold ~4 MeV, optimal 11–14 MeV.