Niobium-101

Properties and data of the isotope ¹⁰¹Nb.

Contents

General data

Name of the isotope:Niobium-101; Nb-101Symbol:¹⁰¹Nb or 10141NbMass number A:101 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:60Isotopic mass:100.915306(4) u (atomic weight of Niobium-101)Nuclide mass:100.8928152 u (calculated nuclear mass without electrons)Mass excess:-78.89195 MeVMass defect:0.925415272 u (per nucleus)Nuclear binding energy:862.01877338 MeV (per nucleus)
8.53483934 MeV (average binding energy per nucleon)Separation energy:S_N = 7.165(9) MeV (first neutron)
S_P = 9.803(9) MeV (first proton)Half-life:7.1(3) sDecay constant λ:0.097626363459147 s^-1Specific activity α:5.879197123943 × 10⁺²⁰ Bq g^-1
15889721956.605 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Magnetic dipole moment:μ(μ_N) = +3.186(2)Nuclear g-factor:g_l = 1.2744Charge radius:4.4861(203) femtometer fmYear of discovery:1970

Radioactive Decay

Half-life T_½ = 7.1(3) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰¹Mo	100 %	4.628(4) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁰¹Zr, ²⁴⁸Cm, ²⁵²Cf.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 60) and isobaric (same nucleon number A = 101) with Niobium-101. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 60	Isobar A = 101
34	⁹⁴Se
35	⁹⁵Br
36	⁹⁶Kr	¹⁰¹Kr
37	⁹⁷Rb	¹⁰¹Rb
38	⁹⁸Sr	¹⁰¹Sr
39	⁹⁹Y	¹⁰¹Y
40	¹⁰⁰Zr	¹⁰¹Zr
41	¹⁰¹Nb	¹⁰¹Nb
42	¹⁰²Mo	¹⁰¹Mo
43	¹⁰³Tc	¹⁰¹Tc
44	¹⁰⁴Ru	¹⁰¹Ru
45	¹⁰⁵Rh	¹⁰¹Rh
46	¹⁰⁶Pd	¹⁰¹Pd
47	¹⁰⁷Ag	¹⁰¹Ag
48	¹⁰⁸Cd	¹⁰¹Cd
49	¹⁰⁹In	¹⁰¹In
50	¹¹⁰Sn	¹⁰¹Sn
51	¹¹¹Sb
52	¹¹²Te
53	¹¹³I
54	¹¹⁴Xe
55	¹¹⁵Cs
56	¹¹⁶Ba
57	¹¹⁷La