Lead-196m1

Properties and data of the isotope ^196m1Pb.

Contents

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

General data

Name of the isotope:Lead-196m1; Pb-196m1Symbol:^196m1Pb or 196m182PbMass number A:196 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:114Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.390243902439 (= neutron-proton ratio)Neutron excess (N-Z):32Excitation energy:1049.20(9) keVIsotopic mass:195.972787(8) u (atomic weight of Lead-196m1)Nuclide mass:195.9278086 u (calculated nuclear mass without electrons)Mass excess:-25.34875 MeVMass defect:1.656666048 u (per nucleus)Nuclear binding energy:1543.17448372 MeV (per nucleus)
7.8733392 MeV (average binding energy per nucleon)Half-life:< 100 nsDecay constant λ:6931471.8055995 s^-1Specific activity α:2.140630747692 × 10⁺²⁸ Bq g^-1
5.785488507276 × 10⁺¹⁷ Ci g^-1Spin and parity:
(nuclear angular momentum)2+

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
¹⁹⁶Pb		37(3) min	0+
^196m2Pb	1738.27(12) keV	1 μs	4+
^196m3Pb	1797.51(14) keV	140(14) ns	5-
^196m4Pb	2694.12(19) keV	270(4) ns	12+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 114) and isobaric (same nucleon number A = 196) with Lead-196m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 114	Isobar A = 196
70	¹⁸⁴Yb
71	¹⁸⁵Lu
72	¹⁸⁶Hf
73	¹⁸⁷Ta
74	¹⁸⁸W	¹⁹⁶W
75	¹⁸⁹Re	¹⁹⁶Re
76	¹⁹⁰Os	¹⁹⁶Os
77	¹⁹¹Ir	¹⁹⁶Ir
78	¹⁹²Pt	¹⁹⁶Pt
79	¹⁹³Au	¹⁹⁶Au
80	¹⁹⁴Hg	¹⁹⁶Hg
81	¹⁹⁵Tl	¹⁹⁶Tl
82	¹⁹⁶Pb	¹⁹⁶Pb
83	¹⁹⁷Bi	¹⁹⁶Bi
84	¹⁹⁸Po	¹⁹⁶Po
85	¹⁹⁹At	¹⁹⁶At
86	²⁰⁰Rn	¹⁹⁶Rn
87	²⁰¹Fr
88	²⁰²Ra
89	²⁰³Ac