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Niobium-85

Properties and data of the isotope 85Nb.


Content

See also: list of Niobium isotopes.

 

General data

Name of the isotope:Niobium-85; Nb-85Symbol:85Nb or 8541NbMass number A:85 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:44Isotopic mass:84.928846(4) u (atomic weight of Niobium-85)Nuclide mass:84.9063552 u (calculated nuclear mass without electrons)Mass excess:-66.27952 MeVMass defect:0.77323661600002 u (per nucleus)Nuclear binding energy:720.26526838 MeV (per nucleus)
8.47370904 MeV (average binding energy per nucleon)
Separation energy:SN = 13.132(14) MeV (first neutron)
SP = 2.147(7) MeV (first proton)
Half-life:20.9(7) sDecay constant λ:0.033164936868897 s-1Specific activity α:2.377665731373 × 10+20 Bq g-1
6426123598.3078 Ci g-1
Spin and parity:
(nuclear angular momentum)
(9/2+)Mirror nucleus:Ruthenium-85Year of discovery:1988

 

Radioactive Decay

Half-life T½ = 20.9(7) s respectively 2.09 × 101 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
EE/β+85Zr100 %6.896(8) MeV

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 44) and isobaric (same nucleon number A = 85) with Niobium-85. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 44Isobar A = 85
2367V
2468Cr
2569Mn
2670Fe
2771Co
2872Ni
2973Cu
3074Zn85Zn
3175Ga85Ga
3276Ge85Ge
3377As85As
3478Se85Se
3579Br85Br
3680Kr85Kr
3781Rb85Rb
3882Sr85Sr
3983Y85Y
4084Zr85Zr
4185Nb85Nb
4286Mo85Mo
4387Tc85Tc
4488Ru85Ru
4589Rh
4690Pd

 

External data and identifiers

Adopted Levels, Gammas:NuDat 85Nb

 


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Last update: 2023-10-04


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