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Niobium-90m4

Properties and data of the isotope 90Nb.


Content

See also: list of Niobium isotopes.

 

General data

Name of the isotope:Niobium-90m4; Nb-90m4Symbol:90Nb or 9041NbMass number A:90 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:49Isotopic mass:89.911259(4) u (atomic weight of Niobium-90m4)
Excitation energy: 382.01(25) keV
Nuclide mass:89.8887682 u (calculated nuclear mass without electrons)Mass excess:-82.66171 MeVMass defect:0.834148196 u (per nucleus)Nuclear binding energy:777.00403968 MeV (per nucleus)
8.63337822 MeV (average binding energy per nucleon)
Half-life:6.19(8) msDecay constant λ:111.97854290145 s-1Specific activity α:7.576972569022 × 10+23 Bq g-1
20478304240601 Ci g-1
Spin and parity:
(nuclear angular momentum)
1+

 

Radioactive Decay

Half-life T½ = 6.19(8) ms respectively 6.19 × 10-3 seconds s.

Decay modeDaughterProbabilityDecay energyγ energy
(intensity)
Iso90Nb100 %

 

Nuclear Isomers

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

Nuclear IsomerExcitation EnergyHalf-lifeSpin
90Nb14.60(5) h8+
90m1Nb122.370(22) keV63(2) μs6+
90m2Nb124.67(25) keV18.81(6) s4-
90m3Nb171.10(10) keV1 μs7+
90m5Nb1880.21(20) keV472(13) ns(11-)

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 49) and isobaric (same nucleon number A = 90) with Niobium-90m4. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

OZIsotone N = 49Isobar A = 90
2776Co
2877Ni
2978Cu
3079Zn
3180Ga
3281Ge90Ge
3382As90As
3483Se90Se
3584Br90Br
3685Kr90Kr
3786Rb90Rb
3887Sr90Sr
3988Y90Y
4089Zr90Zr
4190Nb90Nb
4291Mo90Mo
4392Tc90Tc
4493Ru90Ru
4594Rh90Rh
4695Pd90Pd
4796Ag
4897Cd
4998In
5099Sn

 


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Last update: 2020-10-15


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