Niobium-103

Properties and data of the isotope ¹⁰³Nb.

Contents

General data

Name of the isotope:Niobium-103; Nb-103Symbol:¹⁰³Nb or 10341NbMass number A:103 (= number of nucleons)Atomic number Z:41 (= number of protons)Neutrons N:62Isotopic mass:102.919453(4) u (atomic weight of Niobium-103)Nuclide mass:102.8969622 u (calculated nuclear mass without electrons)Mass excess:-75.02905 MeVMass defect:0.93859810399999 u (per nucleus)Nuclear binding energy:874.29850229 MeV (per nucleus)
8.48833497 MeV (average binding energy per nucleon)Separation energy:S_N = 6.795(5) MeV (first neutron)
S_P = 10.73(1) MeV (first proton)Half-life:1.5(2) sDecay constant λ:0.4620981203733 s^-1Specific activity α:2.728254874509 × 10⁺²¹ Bq g^-1
73736618229.995 Ci g^-1Spin and parity:
(nuclear angular momentum)(5/2+)Magnetic dipole moment:μ(μ_N) = +3.133(4)Nuclear g-factor:g_l = 1.2532Charge radius:4.5097(227) femtometer fmYear of discovery:1971

Radioactive Decay

Half-life T_½ = 1.5(2) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁰³Mo	100 %	5.932(10) MeV

Parent Nuclides

Direct parent isotopes are: ¹⁰³Zr, ²⁴⁸Cm, ²⁵²Cf.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 62) and isobaric (same nucleon number A = 103) with Niobium-103. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 62	Isobar A = 103
35	⁹⁷Br
36	⁹⁸Kr
37	⁹⁹Rb	¹⁰³Rb
38	¹⁰⁰Sr	¹⁰³Sr
39	¹⁰¹Y	¹⁰³Y
40	¹⁰²Zr	¹⁰³Zr
41	¹⁰³Nb	¹⁰³Nb
42	¹⁰⁴Mo	¹⁰³Mo
43	¹⁰⁵Tc	¹⁰³Tc
44	¹⁰⁶Ru	¹⁰³Ru
45	¹⁰⁷Rh	¹⁰³Rh
46	¹⁰⁸Pd	¹⁰³Pd
47	¹⁰⁹Ag	¹⁰³Ag
48	¹¹⁰Cd	¹⁰³Cd
49	¹¹¹In	¹⁰³In
50	¹¹²Sn	¹⁰³Sn
51	¹¹³Sb	¹⁰³Sb
52	¹¹⁴Te
53	¹¹⁵I
54	¹¹⁶Xe
55	¹¹⁷Cs
56	¹¹⁸Ba
57	¹¹⁹La
58	¹²⁰Ce
59	¹²¹Pr