Bismuth-192

Properties and data of the isotope ¹⁹²Bi.

Content

General data

Name of the isotope:Bismuth-192; Bi-192Symbol:¹⁹²Bi or 19283BiMass number A:192 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:109Isotopic mass:191.98547(3) u (atomic weight of Bismuth-192)Nuclide mass:191.9399431 u (calculated nuclear mass without electrons)Mass excess:-13.53461 MeVMass defect:1.6084835 u (per nucleus)Nuclear binding energy:1498.29272935 MeV (per nucleus)
7.80360797 MeV (average binding energy per nucleon)Separation energy:S_N = 8.37(3) MeV (first neutron)
S_P = 0.59(5) MeV (first proton)Half-life:34.6(9) sDecay constant λ:0.020033155507513 s^-1Specific activity α:6.316360436401 × 10⁺¹⁹ Bq g^-1
1707124442.2706 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1971

Radioactive Decay

Half-life T_½ = 34.6(9) s respectively 3.46 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁸⁸Tl	12(5) %	6.377(4) MeV
EE/β⁺	¹⁹²Pb	88(5) %	9.02(3) MeV

Parent Nuclides

Direct parent isotope is: ¹⁹⁶At.

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
^192mBi	147(34) keV	39.6(4) s	(10-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 109) and isobaric (same nucleon number A = 192) with Bismuth-192. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 109	Isobar A = 192
68	¹⁷⁷Er
69	¹⁷⁸Tm
70	¹⁷⁹Yb
71	¹⁸⁰Lu
72	¹⁸¹Hf
73	¹⁸²Ta	¹⁹²Ta
74	¹⁸³W	¹⁹²W
75	¹⁸⁴Re	¹⁹²Re
76	¹⁸⁵Os	¹⁹²Os
77	¹⁸⁶Ir	¹⁹²Ir
78	¹⁸⁷Pt	¹⁹²Pt
79	¹⁸⁸Au	¹⁹²Au
80	¹⁸⁹Hg	¹⁹²Hg
81	¹⁹⁰Tl	¹⁹²Tl
82	¹⁹¹Pb	¹⁹²Pb
83	¹⁹²Bi	¹⁹²Bi
84	¹⁹³Po	¹⁹²Po
85	¹⁹⁴At	¹⁹²At
86	¹⁹⁵Rn