Zirconium-89

Properties and data of the isotope ⁸⁹Zr.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

Literature

See also: List of individual Zirconium isotopes (and general data sources).

General data

Name of the isotope:Zirconium-89; Zr-89Symbol:⁸⁹Zr or 8940ZrMass number A:89 (= number of nucleons)Atomic number Z:40 (= number of protons)Neutrons N:49Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.225 (= neutron-proton ratio)Neutron excess (N-Z):9Isotopic mass:88.908882(3) u (atomic weight of Zirconium-89)Nuclide mass:88.8869398 u (calculated nuclear mass without electrons)Mass excess:-84.87587 MeVMass defect:0.828700164 u (per nucleus)Nuclear binding energy:771.92923057 MeV (per nucleus)
8.67336214 MeV (average binding energy per nucleon)Separation energy:S_N = 9.318(6) MeV (first neutron)
S_P = 7.866(3) MeV (first proton)Half-life:78.41(12) hDecay constant λ:2.455565406056 × 10^-6 s^-1Specific activity α:1.680427359779 × 10⁺¹⁶ Bq g^-1
454169.55669714 Ci g^-1Spin and parity:
(nuclear angular momentum)9/2+Magnetic dipole moment:μ(μ_N) = - 1.045(6)Quadrupole moment Q:0.275(97) barn (100 fm²)Nuclear g-factor:g_l = -0.23222222222222Charge radius:4.2706(10) femtometer fmYear of discovery:1948

Radioactive Decay

Half-life T_½ = 78.41(12) h (hours) respectively 2.82276 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁸⁹Y	100 %	2.833(3) MeV

Parent Nuclides

Direct parent isotope is: ⁸⁹Nb.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^89mZr	587.82(10) keV	4.161(17) min	1/2-

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 89) with Zirconium-89. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 49	Isobar A = 89
27	⁷⁶Co
28	⁷⁷Ni
29	⁷⁸Cu
30	⁷⁹Zn
31	⁸⁰Ga
32	⁸¹Ge	⁸⁹Ge
33	⁸²As	⁸⁹As
34	⁸³Se	⁸⁹Se
35	⁸⁴Br	⁸⁹Br
36	⁸⁵Kr	⁸⁹Kr
37	⁸⁶Rb	⁸⁹Rb
38	⁸⁷Sr	⁸⁹Sr
39	⁸⁸Y	⁸⁹Y
40	⁸⁹Zr	⁸⁹Zr
41	⁹⁰Nb	⁸⁹Nb
42	⁹¹Mo	⁸⁹Mo
43	⁹²Tc	⁸⁹Tc
44	⁹³Ru	⁸⁹Ru
45	⁹⁴Rh	⁸⁹Rh
46	⁹⁵Pd
47	⁹⁶Ag
48	⁹⁷Cd
49	⁹⁸In
50	⁹⁹Sn

External data and identifiers

Adopted Levels, Gammas:NuDat 89Zr

Literature and References

[1] - Gregory W. Severin, Jonathan W. Engle, Todd E. Barnhart, R. Jerry Nickles:
^{89<(sup>Zr Radiochemistry for Positron Emission Tomography}.
In: Medicinal Chemistry, (2011), DOI 10.2174/157340611796799186.

[2] - Jonathan R. Dilworth , Sofia I. Pascu:
The chemistry of PET imaging with zirconium-89.
In: Chemical Society Reviews, (2018), DOI 10.1039/C7CS00014F.

[3] - NN:
Zirconium-89 PET.
In: Kommerzielle Produktinfo mit Zr-89 Zerfallstabelle, (2020).