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Germanium-69

Properties and data of the isotope 69Ge.


Content

See also: list of Germanium isotopes.

 

General data

Name of the isotope:Germanium-69; Ge-69Symbol:69Ge or 6932GeMass number A:69 (= number of nucleons)Atomic number Z:32 (= number of protons)Neutrons N:37Isotopic mass:68.9279645(14) u (atomic weight of Germanium-69)Nuclide mass:68.9104105 u (calculated nuclear mass without electrons)Mass excess:-67.10064 MeVMass defect:0.643038416 u (per nucleus)Nuclear binding energy:598.98642627 MeV (per nucleus)
8.6809627 MeV (average binding energy per nucleon)
Separation energy:SN = 8.1932(23) MeV (first neutron)
SP = 7.3036(19) MeV (first proton)
Half-life:39.05(10) hDecay constant λ:4.930624417128 × 10-6 s-1Specific activity α:4.366605112851 × 10+16 Bq g-1
1180163.544014 Ci g-1
Spin and parity:
(nuclear angular momentum)
5/2-Magnetic dipole moment:μ(μN) = 0.735(7)Quadrupole moment Q:0.024(5) barn (100 fm2)Nuclear g-factor:gl = 0.294Year of discovery:1938

 

Radioactive Decay

Half-life T½ = 39.05(10) h (hours) respectively 1.40580 × 105 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
EE/β+69Ga100 %2.2271(18) MeV

 

Parent Nuclides

Direct parent isotope is: 69As.

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
69m1Ge86.76(2) keV5.1(2) μs1/2-
69m2Ge397.94(2) keV2.81(5) μs9/2+

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 37) and isobaric (same nucleon number A = 69) with Germanium-69. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 37Isobar A = 69
1956K
2057Ca
2158Sc
2259Ti
2360V
2461Cr
2562Mn69Mn
2663Fe69Fe
2764Co69Co
2865Ni69Ni
2966Cu69Cu
3067Zn69Zn
3168Ga69Ga
3269Ge69Ge
3370As69As
3471Se69Se
3572Br69Br
3673Kr69Kr
3774Rb
3875Sr
3976Y
4077Zr

 

External data and identifiers

Adopted Levels, Gammas:NuDat 69Ge

 


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Last update: 2023-10-04


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