Bismuth-192m

Properties and data of the isotope ¹⁹²Bi.

Content

General data

Name of the isotope:Bismuth-192m; Bi-192mSymbol: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-192m)
Excitation energy: 147(34) keVNuclide 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)Half-life:39.6(4) sDecay constant λ:0.017503716680807 s^-1Specific activity α:5.518840179279 × 10⁺¹⁹ Bq g^-1
1491578426.8324 Ci g^-1Spin and parity:
(nuclear angular momentum)(10-)

Radioactive Decay

Half-life T_½ = 39.6(4) s respectively 3.96 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁸⁸Tl	10(3) %
EE/β⁺	¹⁹²Pb	90(3) %

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
¹⁹²Bi		34.6(9) s	(3+)

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-192m. 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