Bismuth-193

Properties and data of the isotope ¹⁹³Bi.

Contents

General data

Name of the isotope:Bismuth-193; Bi-193Symbol:¹⁹³Bi or 19383BiMass number A:193 (= number of nucleons)Atomic number Z:83 (= number of protons)Neutrons N:110Isotopic mass:192.982947(8) u (atomic weight of Bismuth-193)Nuclide mass:192.9374201 u (calculated nuclear mass without electrons)Mass excess:-15.88477 MeVMass defect:1.619671416 u (per nucleus)Nuclear binding energy:1508.71420598 MeV (per nucleus)
7.81717205 MeV (average binding energy per nucleon)Separation energy:S_N = 10.42(3) MeV (first neutron)
S_P = 0.618(15) MeV (first proton)Half-life:63.6(30) sDecay constant λ:0.010898540574842 s^-1Specific activity α:3.418361797366 × 10⁺¹⁹ Bq g^-1
923881566.85578 Ci g^-1Spin and parity:
(nuclear angular momentum)(9/2-)Magnetic dipole moment:μ(μ_N) = 3.734(95)Quadrupole moment Q:-1.88(38) barn (100 fm²)Nuclear g-factor:g_l = 0.82977777777778Year of discovery:1971

Radioactive Decay

Half-life T_½ = 63.6(30) s respectively 6.36 × 10¹ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁸⁹Tl	3.5(15) %	6.307(5) MeV
EC/β⁺	¹⁹³Pb	96.5(15) %	6.31(5) MeV

Parent Nuclides

Direct parent isotope is: ¹⁹⁷At.

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
^193mBi	305(6) keV	3.12(26) s	(1/2+)
^193m2Bi	605.53(18) keV	153(10) ns	13/2+
^193m3Bi	2349.6(6) keV	85(3) μs	29/2+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 110) and isobaric (same nucleon number A = 193) with Bismuth-193. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 110	Isobar A = 193
69	¹⁷⁹Tm
70	¹⁸⁰Yb
71	¹⁸¹Lu
72	¹⁸²Hf
73	¹⁸³Ta	¹⁹³Ta
74	¹⁸⁴W	¹⁹³W
75	¹⁸⁵Re	¹⁹³Re
76	¹⁸⁶Os	¹⁹³Os
77	¹⁸⁷Ir	¹⁹³Ir
78	¹⁸⁸Pt	¹⁹³Pt
79	¹⁸⁹Au	¹⁹³Au
80	¹⁹⁰Hg	¹⁹³Hg
81	¹⁹¹Tl	¹⁹³Tl
82	¹⁹²Pb	¹⁹³Pb
83	¹⁹³Bi	¹⁹³Bi
84	¹⁹⁴Po	¹⁹³Po
85	¹⁹⁵At	¹⁹³At
86	¹⁹⁶Rn	¹⁹³Rn