Zirconium-80

Properties and data of the isotope ⁸⁰Zr.

Content

General data

Name of the isotope:Zirconium-80; Zr-80Symbol:⁸⁰Zr or 8040ZrMass number A:80 (= number of nucleons)Atomic number Z:40 (= number of protons)Neutrons N:40Isotopic mass:79.94164(32) u (atomic weight of Zirconium-80)Nuclide mass:79.9196978 u (calculated nuclear mass without electrons)Mass excess:-54.36199 MeVMass defect:0.71795791999999 u (per nucleus)Nuclear binding energy:668.77349473 MeV (per nucleus)
8.35966868 MeV (average binding energy per nucleon)Separation energy:S_N = 15.66(42) MeV (first neutron)
S_P = 3.83(31) MeV (first proton)Half-life:4.6(6) sDecay constant λ:0.15068416968694 s^-1Specific activity α:1.148659867363 × 10⁺²¹ Bq g^-1
31044861280.103 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1987

Radioactive Decay

Half-life T_½ = 4.6(6) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	⁸⁰Y		6.79(30) MeV
EE, p	⁷⁹Sr	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 40) and isobaric (same nucleon number A = 80) with Zirconium-80. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 40	Isobar A = 80
21	⁶¹Sc
22	⁶²Ti
23	⁶³V
24	⁶⁴Cr
25	⁶⁵Mn
26	⁶⁶Fe
27	⁶⁷Co
28	⁶⁸Ni	⁸⁰Ni
29	⁶⁹Cu	⁸⁰Cu
30	⁷⁰Zn	⁸⁰Zn
31	⁷¹Ga	⁸⁰Ga
32	⁷²Ge	⁸⁰Ge
33	⁷³As	⁸⁰As
34	⁷⁴Se	⁸⁰Se
35	⁷⁵Br	⁸⁰Br
36	⁷⁶Kr	⁸⁰Kr
37	⁷⁷Rb	⁸⁰Rb
38	⁷⁸Sr	⁸⁰Sr
39	⁷⁹Y	⁸⁰Y
40	⁸⁰Zr	⁸⁰Zr
41	⁸¹Nb
42	⁸²Mo