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Niobium-91m1

Properties and data of the isotope 91Nb.


Content

See also: list of Niobium isotopes.

 

General data

Name of the isotope:Niobium-91m1; Nb-91m1Symbol:91Nb or 9141NbMass number A:91 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:50Isotopic mass:90.906990(3) u (atomic weight of Niobium-91m1)
Excitation energy: 104.60(5) keV
Nuclide mass:90.8844992 u (calculated nuclear mass without electrons)Mass excess:-86.63826 MeVMass defect:0.84708211200001 u (per nucleus)Nuclear binding energy:789.05190484 MeV (per nucleus)
8.67090005 MeV (average binding energy per nucleon)
Half-life:60.86(22) dDecay constant λ:1.318195335530 × 10-7 s-1Specific activity α:8.820397768304 × 10+14 Bq g-1
23838.912887309 Ci g-1
Spin and parity:
(nuclear angular momentum)
1/2-Magnetic dipole moment:μ(μN) = -0.101(2)Nuclear g-factor:gl = -0.202

 

Radioactive Decay

Half-life T½ = 60.86(22) d respectively 5.258304 × 106 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
EE/β+91Zr3.4(5) %
Iso91Nb96.6(5) %

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
91Nb680(130) a9/2+
91m2Nb2034.42(20) keV3.76(12) μs(17/2-)

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 50) and isobaric (same nucleon number A = 91) with Niobium-91m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 50Isobar A = 91
2878Ni
2979Cu
3080Zn
3181Ga
3282Ge
3383As91As
3484Se91Se
3585Br91Br
3686Kr91Kr
3787Rb91Rb
3888Sr91Sr
3989Y91Y
4090Zr91Zr
4191Nb91Nb
4292Mo91Mo
4393Tc91Tc
4494Ru91Ru
4595Rh91Rh
4696Pd91Pd
4797Ag
4898Cd
4999In
50100Sn

 


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Last update: 2020-10-15


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