Niobium-98

Properties and data of the isotope ⁹⁸Nb.

Contents

General data

Name of the isotope:Niobium-98; Nb-98Symbol:⁹⁸Nb or 9841NbMass number A:98 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:57Isotopic mass:97.910333(5) u (atomic weight of Niobium-98)Nuclide mass:97.8878422 u (calculated nuclear mass without electrons)Mass excess:-83.52427 MeVMass defect:0.90439352400001 u (per nucleus)Nuclear binding energy:842.43714124 MeV (per nucleus)
8.59629736 MeV (average binding energy per nucleon)Separation energy:S_N = 5.990(7) MeV (first neutron)
S_P = 7.871(5) MeV (first proton)Half-life:2.86(6) sDecay constant λ:0.24235915404194 s^-1Specific activity α:1.504660787974 × 10⁺²¹ Bq g^-1
40666507783.105 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1960

Radioactive Decay

Half-life T_½ = 2.86(6) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	⁹⁸Mo	100 %	4.591(5) MeV

Parent Nuclides

Direct parent isotope is: ⁹⁸Zr.

Nuclear Isomers

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

Nuclear Isomer	Excitation Energy	Half-life	Spin
^98mNb	84(4) keV	51.3(4) min	(5+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 57) and isobaric (same nucleon number A = 98) with Niobium-98. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 57	Isobar A = 98
32	⁸⁹Ge
33	⁹⁰As
34	⁹¹Se
35	⁹²Br	⁹⁸Br
36	⁹³Kr	⁹⁸Kr
37	⁹⁴Rb	⁹⁸Rb
38	⁹⁵Sr	⁹⁸Sr
39	⁹⁶Y	⁹⁸Y
40	⁹⁷Zr	⁹⁸Zr
41	⁹⁸Nb	⁹⁸Nb
42	⁹⁹Mo	⁹⁸Mo
43	¹⁰⁰Tc	⁹⁸Tc
44	¹⁰¹Ru	⁹⁸Ru
45	¹⁰²Rh	⁹⁸Rh
46	¹⁰³Pd	⁹⁸Pd
47	¹⁰⁴Ag	⁹⁸Ag
48	¹⁰⁵Cd	⁹⁸Cd
49	¹⁰⁶In	⁹⁸In
50	¹⁰⁷Sn
51	¹⁰⁸Sb
52	¹⁰⁹Te
53	¹¹⁰I
54	¹¹¹Xe
55	¹¹²Cs