Niobium-102

Properties and data of the isotope ¹⁰²Nb.

Contents

General Data

Radioactive Decay

Parent Nuclides

Isotones und Isobares

See also: List of individual Niobium isotopes (and general data sources).

General data

Name of the isotope:Niobium-102; Nb-102Symbol:¹⁰²Nb or 10241NbMass number A:102 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:61Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4878048780488 (= neutron-proton ratio)Neutron excess (N-Z):20Isotopic mass:101.9180837(27) u (atomic weight of Niobium-102)Nuclide mass:101.8955929 u (calculated nuclear mass without electrons)Mass excess:-76.30454 MeVMass defect:0.93130248800001 u (per nucleus)Nuclear binding energy:867.50267976 MeV (per nucleus)
8.50492823 MeV (average binding energy per nucleon)Separation energy:S_N = 5.484(5) MeV (first neutron)
S_P = 10.428(9) MeV (first proton)Half-life:4.3(4) sDecay constant λ:0.16119701873487 s^-1Specific activity α:9.611397554685 × 10⁺²⁰ Bq g^-1
25976750147.799 Ci g^-1Spin and parity:
(nuclear angular momentum)(4+)Year of discovery:1972

Radioactive Decay

Half-life T_½ = 4.3(4) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰²Mo	100 %	7.2562(9) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁰²Zr, ²⁵²Cf.

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
^102m1Nb	+x	1.3(2) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 102) with Niobium-102. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 61	Isobar A = 102
34	⁹⁵Se
35	⁹⁶Br
36	⁹⁷Kr
37	⁹⁸Rb	¹⁰²Rb
38	⁹⁹Sr	¹⁰²Sr
39	¹⁰⁰Y	¹⁰²Y
40	¹⁰¹Zr	¹⁰²Zr
41	¹⁰²Nb	¹⁰²Nb
42	¹⁰³Mo	¹⁰²Mo
43	¹⁰⁴Tc	¹⁰²Tc
44	¹⁰⁵Ru	¹⁰²Ru
45	¹⁰⁶Rh	¹⁰²Rh
46	¹⁰⁷Pd	¹⁰²Pd
47	¹⁰⁸Ag	¹⁰²Ag
48	¹⁰⁹Cd	¹⁰²Cd
49	¹¹⁰In	¹⁰²In
50	¹¹¹Sn	¹⁰²Sn
51	¹¹²Sb
52	¹¹³Te
53	¹¹⁴I
54	¹¹⁵Xe
55	¹¹⁶Cs
56	¹¹⁷Ba
57	¹¹⁸La
58	¹¹⁹Ce