Yttrium-80

Properties and data of the isotope ⁸⁰Y.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Yttrium-80; Y-80Symbol:⁸⁰Y or 8039YMass number A:80 (= number of nucleons)Atomic number Z:39 (= number of protons)Neutrons N:41Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.0512820512821 (= neutron-proton ratio)Neutron excess (N-Z):2Isotopic mass:79.934355(7) u (atomic weight of Yttrium-80)Nuclide mass:79.9129613 u (calculated nuclear mass without electrons)Mass excess:-61.14792 MeVMass defect:0.726082804 u (per nucleus)Nuclear binding energy:676.34177543 MeV (per nucleus)
8.45427219 MeV (average binding energy per nucleon)Separation energy:S_N = 11.40(8) MeV (first neutron)
S_P = 2.96(1) MeV (first proton)Half-life:30.1(5) sDecay constant λ:0.023028145533553 s^-1Specific activity α:1.755427039825 × 10⁺²⁰ Bq g^-1
4744397404.9327 Ci g^-1Spin and parity:
(nuclear angular momentum)(4-)Year of discovery:1981

Radioactive Decay

Half-life T_½ = 30.1(5) s respectively 3.01 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	⁸⁰Sr		9.163(7) MeV
EC, p	⁷⁹Rb

Parent Nuclides

Direct parent isotope is: ⁸⁰Zr.

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
^80m1Y	228.5(1) keV	4.8(3) s	(1-)
^80m2Y	312.6(9) keV	4.7(3) μs	(2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 41) and isobaric (same nucleon number A = 80) with Yttrium-80. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 41	Isobar A = 80
21	⁶²Sc
22	⁶³Ti
23	⁶⁴V
24	⁶⁵Cr
25	⁶⁶Mn
26	⁶⁷Fe
27	⁶⁸Co
28	⁶⁹Ni	⁸⁰Ni
29	⁷⁰Cu	⁸⁰Cu
30	⁷¹Zn	⁸⁰Zn
31	⁷²Ga	⁸⁰Ga
32	⁷³Ge	⁸⁰Ge
33	⁷⁴As	⁸⁰As
34	⁷⁵Se	⁸⁰Se
35	⁷⁶Br	⁸⁰Br
36	⁷⁷Kr	⁸⁰Kr
37	⁷⁸Rb	⁸⁰Rb
38	⁷⁹Sr	⁸⁰Sr
39	⁸⁰Y	⁸⁰Y
40	⁸¹Zr	⁸⁰Zr
41	⁸²Nb
42	⁸³Mo
44	⁸⁵Ru