Zirconium-91 (Zr-91)

Identity

Protons

40

Neutrons

51

Mass number

91

Mass

90.91 ± 0.10 u

Mass excess

-87.896 MeV

Spin

5/2+*

Stability

stable

Natural occurrence

11.22 % of zirconium

Produced by

• Y-91
• Nb-91
• Nb-91