Bismuth-196

Properties and data of the isotope ¹⁹⁶Bi.

Contents

General data

Name of the isotope:Bismuth-196; Bi-196Symbol:¹⁹⁶Bi or 19683BiMass number A:196 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:113Isotopic mass:195.980667(26) u (atomic weight of Bismuth-196)Nuclide mass:195.9351401 u (calculated nuclear mass without electrons)Mass excess:-18.00857 MeVMass defect:1.647946164 u (per nucleus)Nuclear binding energy:1535.05196409 MeV (per nucleus)
7.83189778 MeV (average binding energy per nucleon)Separation energy:S_N = 8.055(25) MeV (first neutron)
S_P = 1.59(3) MeV (first proton)Half-life:308(12) sDecay constant λ:0.0022504778589609 s^-1Specific activity α:6.950099830169 × 10⁺¹⁸ Bq g^-1
187840535.95054 Ci g^-1Spin and parity:
(nuclear angular momentum)(3+)Year of discovery:1976

Radioactive Decay

Half-life T_½ = 308(12) s respectively 3.08 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁹²Tl	0.00115(34) %	5.438 MeV
EC/β⁺	¹⁹⁶Pb	> 99.99 %	7.339(26) MeV

Parent Nuclides

Direct parent isotope is: ²⁰⁰At.

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
^196m1Bi	169(4) keV	0.6(5) s	(7+)
^196m2Bi	271(5) keV	240(3) s	(10-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 113) and isobaric (same nucleon number A = 196) with Bismuth-196. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 113	Isobar A = 196
70	¹⁸³Yb
71	¹⁸⁴Lu
72	¹⁸⁵Hf
73	¹⁸⁶Ta
74	¹⁸⁷W	¹⁹⁶W
75	¹⁸⁸Re	¹⁹⁶Re
76	¹⁸⁹Os	¹⁹⁶Os
77	¹⁹⁰Ir	¹⁹⁶Ir
78	¹⁹¹Pt	¹⁹⁶Pt
79	¹⁹²Au	¹⁹⁶Au
80	¹⁹³Hg	¹⁹⁶Hg
81	¹⁹⁴Tl	¹⁹⁶Tl
82	¹⁹⁵Pb	¹⁹⁶Pb
83	¹⁹⁶Bi	¹⁹⁶Bi
84	¹⁹⁷Po	¹⁹⁶Po
85	¹⁹⁸At	¹⁹⁶At
86	¹⁹⁹Rn	¹⁹⁶Rn
87	²⁰⁰Fr
88	²⁰¹Ra