Germanium-80

Properties and data of the isotope ⁸⁰Ge.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

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

General data

Name of the isotope:Germanium-80; Ge-80Symbol:⁸⁰Ge or 8032GeMass number A:80 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:48Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.5 (= neutron-proton ratio)Neutron excess (N-Z):16Isotopic mass:79.9253508(22) u (atomic weight of Germanium-80)Nuclide mass:79.9077968 u (calculated nuclear mass without electrons)Mass excess:-69.53528 MeVMass defect:0.740966192 u (per nucleus)Nuclear binding energy:690.20556205 MeV (per nucleus)
8.62756953 MeV (average binding energy per nucleon)Separation energy:S_N = 8.08(4) MeV (first neutron)
S_P = 14.2766(28) MeV (first proton)Half-life:29.5(4) sDecay constant λ:0.023496514595252 s^-1Specific activity α:1.770393458967 × 10⁺²⁰ Bq g^-1
4784847186.3986 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1972

Radioactive Decay

Half-life T_½ = 29.5(4) s respectively 2.95 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁸⁰As	100 %	2.679(4) MeV

Parent Nuclides

Direct parent isotopes are: ⁸⁰Ga, ⁸¹Ga.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 48) and isobaric (same nucleon number A = 80) with Germanium-80. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 48	Isobar A = 80
26	⁷⁴Fe
27	⁷⁵Co
28	⁷⁶Ni	⁸⁰Ni
29	⁷⁷Cu	⁸⁰Cu
30	⁷⁸Zn	⁸⁰Zn
31	⁷⁹Ga	⁸⁰Ga
32	⁸⁰Ge	⁸⁰Ge
33	⁸¹As	⁸⁰As
34	⁸²Se	⁸⁰Se
35	⁸³Br	⁸⁰Br
36	⁸⁴Kr	⁸⁰Kr
37	⁸⁵Rb	⁸⁰Rb
38	⁸⁶Sr	⁸⁰Sr
39	⁸⁷Y	⁸⁰Y
40	⁸⁸Zr	⁸⁰Zr
41	⁸⁹Nb
42	⁹⁰Mo
43	⁹¹Tc
44	⁹²Ru
45	⁹³Rh
46	⁹⁴Pd
47	⁹⁵Ag
48	⁹⁶Cd
49	⁹⁷In
50	⁹⁸Sn