Niobium-100

Properties and data of the isotope ¹⁰⁰Nb.

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-100; Nb-100Symbol:¹⁰⁰Nb or 10041NbMass number A:100 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:59Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4390243902439 (= neutron-proton ratio)Neutron excess (N-Z):18Isotopic mass:99.914334(9) u (atomic weight of Niobium-100)Nuclide mass:99.8918432 u (calculated nuclear mass without electrons)Mass excess:-79.79737 MeVMass defect:0.91772235600001 u (per nucleus)Nuclear binding energy:854.85286828 MeV (per nucleus)
8.54852868 MeV (average binding energy per nucleon)Separation energy:S_N = 5.533(14) MeV (first neutron)
S_P = 9.466(13) MeV (first proton)Half-life:1.5(2) sDecay constant λ:0.4620981203733 s^-1Specific activity α:2.810929264646 × 10⁺²¹ Bq g^-1
75971061206.662 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1967

Radioactive Decay

Half-life T_½ = 1.5(2) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰⁰Mo	100 %	6.396(8) MeV

Parent Nuclides

Direct parent isotope is: ¹⁰⁰Zr.

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
^100m1Nb	314(23) keV	2.99(11) s	(5+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 100) with Niobium-100. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 59	Isobar A = 100
33	⁹²As
34	⁹³Se
35	⁹⁴Br
36	⁹⁵Kr	¹⁰⁰Kr
37	⁹⁶Rb	¹⁰⁰Rb
38	⁹⁷Sr	¹⁰⁰Sr
39	⁹⁸Y	¹⁰⁰Y
40	⁹⁹Zr	¹⁰⁰Zr
41	¹⁰⁰Nb	¹⁰⁰Nb
42	¹⁰¹Mo	¹⁰⁰Mo
43	¹⁰²Tc	¹⁰⁰Tc
44	¹⁰³Ru	¹⁰⁰Ru
45	¹⁰⁴Rh	¹⁰⁰Rh
46	¹⁰⁵Pd	¹⁰⁰Pd
47	¹⁰⁶Ag	¹⁰⁰Ag
48	¹⁰⁷Cd	¹⁰⁰Cd
49	¹⁰⁸In	¹⁰⁰In
50	¹⁰⁹Sn	¹⁰⁰Sn
51	¹¹⁰Sb
52	¹¹¹Te
53	¹¹²I
54	¹¹³Xe
55	¹¹⁴Cs
56	¹¹⁵Ba
57	¹¹⁶La