Lead-193m2

Properties and data of the isotope ^193m2Pb.

Contents

See also: List of individual Lead isotopes (and general data sources).

General data

Name of the isotope:Lead-193m2; Pb-193m2Symbol:^193m2Pb or 193m282PbMass number A:193 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:111Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.3536585365854 (= neutron-proton ratio)Neutron excess (N-Z):29Excitation energy:2612.5(5) keVIsotopic mass:192.97617(5) u (atomic weight of Lead-193m2)Nuclide mass:192.9311916 u (calculated nuclear mass without electrons)Mass excess:-22.1975 MeVMass defect:1.6272883 u (per nucleus)Nuclear binding energy:1515.80928772 MeV (per nucleus)
7.85393413 MeV (average binding energy per nucleon)Half-life:180(15) nsDecay constant λ:3850817.6697775 s^-1Specific activity α:1.207821168402 × 10⁺²⁸ Bq g^-1
3.264381536223 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)(33/2+)Magnetic dipole moment:μ(μ_N) = 2.82(15)Quadrupole moment Q:0.45(4) barn (100 fm²)Nuclear g-factor:g_l = 0.17090909090909

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
¹⁹³Pb		5~ min	(3/2-)
^193m1Pb	+x keV	5.8(2) min	(13/2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 111) and isobaric (same nucleon number A = 193) with Lead-193m2. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 111	Isobar A = 193
70	¹⁸¹Yb
71	¹⁸²Lu
72	¹⁸³Hf
73	¹⁸⁴Ta	¹⁹³Ta
74	¹⁸⁵W	¹⁹³W
75	¹⁸⁶Re	¹⁹³Re
76	¹⁸⁷Os	¹⁹³Os
77	¹⁸⁸Ir	¹⁹³Ir
78	¹⁸⁹Pt	¹⁹³Pt
79	¹⁹⁰Au	¹⁹³Au
80	¹⁹¹Hg	¹⁹³Hg
81	¹⁹²Tl	¹⁹³Tl
82	¹⁹³Pb	¹⁹³Pb
83	¹⁹⁴Bi	¹⁹³Bi
84	¹⁹⁵Po	¹⁹³Po
85	¹⁹⁶At	¹⁹³At
86	¹⁹⁷Rn	¹⁹³Rn