Bismuth-190

Properties and data of the isotope ¹⁹⁰Bi.

Contents

General data

Name of the isotope:Bismuth-190; Bi-190Symbol:¹⁹⁰Bi or 19083BiMass number A:190 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:107Isotopic mass:189.988621(24) u (atomic weight of Bismuth-190)
Excitation energy: +x. +y keVNuclide mass:189.9430941 u (calculated nuclear mass without electrons)Mass excess:-10.59947 MeVMass defect:1.588002668 u (per nucleus)Nuclear binding energy:1479.21495723 MeV (per nucleus)
7.78534188 MeV (average binding energy per nucleon)Separation energy:S_N = 8.61(3) MeV (first neutron)
S_P = 0.045(27) MeV (first proton)Half-life:6.3(1) sDecay constant λ:0.11002336199364 s^-1Specific activity α:3.505694094230 × 10⁺²⁰ Bq g^-1
9474848903.3251 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1972

Radioactive Decay

Half-life T_½ = 6.3(1) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁸⁶Tl	ca. 90 %	6.862(3) MeV
EC/β⁺	¹⁹⁰Pb	ca. 10 %	9.817(26) MeV

Parent Nuclides

Direct parent isotope is: ¹⁹⁴At.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 107) and isobaric (same nucleon number A = 190) with Bismuth-190. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 107	Isobar A = 190
65	¹⁷²Tb
66	¹⁷³Dy
67	¹⁷⁴Ho
68	¹⁷⁵Er
69	¹⁷⁶Tm
70	¹⁷⁷Yb
71	¹⁷⁸Lu
72	¹⁷⁹Hf	¹⁹⁰Hf
73	¹⁸⁰Ta	¹⁹⁰Ta
74	¹⁸¹W	¹⁹⁰W
75	¹⁸²Re	¹⁹⁰Re
76	¹⁸³Os	¹⁹⁰Os
77	¹⁸⁴Ir	¹⁹⁰Ir
78	¹⁸⁵Pt	¹⁹⁰Pt
79	¹⁸⁶Au	¹⁹⁰Au
80	¹⁸⁷Hg	¹⁹⁰Hg
81	¹⁸⁸Tl	¹⁹⁰Tl
82	¹⁸⁹Pb	¹⁹⁰Pb
83	¹⁹⁰Bi	¹⁹⁰Bi
84	¹⁹¹Po	¹⁹⁰Po
85	¹⁹²At	¹⁹⁰At
86	¹⁹³Rn