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Germanium-70

Properties and data of the isotope 70Ge.


Content

See also: list of Germanium isotopes.

 

General data

Name of the isotope:Germanium-70; Ge-70Symbol:70Ge or 7032GeMass number A:70 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:38Isotopic mass:69.924249(6) u (atomic weight of Germanium-70)Nuclide mass:69.906695 u (calculated nuclear mass without electrons)Mass excess:-70.5616 MeVMass defect:0.655418832 u (per nucleus)Nuclear binding energy:610.5187095 MeV (per nucleus)
8.72169585 MeV (average binding energy per nucleon)
Separation energy:SN = 11.5325(16) MeV (first neutron)
SP = 8.5230(15) MeV (first proton)
Half-life:stableSpin and parity:
(nuclear angular momentum)
0+Charge radius:4.0414(11) femtometer fmYear of discovery:1923

 

Parent Nuclides

Direct parent isotopes are: 70As, 70Ga.

 

Occurrence

Comparison of the natural Germanium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Germanium
Isotopic mixture
72.630 u100 %
Isotope 70Ge69.924249(6) u20.52(19) %stable0+
Isotope 72Ge71.9220758(5) u27.45(15) %stable0+
Isotope 73Ge72.9234590(4) u7.76(8) %stable9/2+
Isotope 74Ge73.92117776(9) u36.52(12) %stable0+
Isotope 76Ge75.9214027(2) u7.75(12) %1.926(94) × 1021 a0+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 38) and isobaric (same nucleon number A = 70) with Germanium-70. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 38Isobar A = 70
2058Ca
2159Sc
2260Ti
2361V
2462Cr
2563Mn70Mn
2664Fe70Fe
2765Co70Co
2866Ni70Ni
2967Cu70Cu
3068Zn70Zn
3169Ga70Ga
3270Ge70Ge
3371As70As
3472Se70Se
3573Br70Br
3674Kr70Kr
3775Rb
3876Sr
3977Y
4078Zr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 70Ge

 


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Last update: 2020-10-14


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