Lead-180

Properties and data of the isotope ¹⁸⁰Pb.

Contents

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

General data

Name of the isotope:Lead-180; Pb-180Symbol:¹⁸⁰Pb or 18082PbMass number A:180 (= number of nucleons)Atomic number Z:82 (= number of protons)Neutrons N:98Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.1951219512195 (= neutron-proton ratio)Neutron excess (N-Z):16Isotopic mass:179.997916(13) u (atomic weight of Lead-180)Nuclide mass:179.9529376 u (calculated nuclear mass without electrons)Mass excess:-1.94123 MeVMass defect:1.492898392 u (per nucleus)Nuclear binding energy:1390.62589476 MeV (per nucleus)
7.72569942 MeV (average binding energy per nucleon)Separation energy:S_N = 12.06(8) MeV (first neutron)
S_P = 0.96(4) MeV (first proton)Half-life:4.1(3) msDecay constant λ:169.06028794145 s^-1Specific activity α:5.687736691647 × 10⁺²³ Bq g^-1
15372261328777 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Year of discovery:1996

Radioactive Decay

Half-life T_½ = 4.1(3) ms respectively 4.1 × 10^-3 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁷⁶Hg	100 %	7.419(5) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 98) and isobaric (same nucleon number A = 180) with Lead-180. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 98	Isobar A = 180
57	¹⁵⁵La
58	¹⁵⁶Ce
59	¹⁵⁷Pr
60	¹⁵⁸Nd
61	¹⁵⁹Pm
62	¹⁶⁰Sm
63	¹⁶¹Eu
64	¹⁶²Gd
65	¹⁶³Tb
66	¹⁶⁴Dy
67	¹⁶⁵Ho
68	¹⁶⁶Er
69	¹⁶⁷Tm
70	¹⁶⁸Yb	¹⁸⁰Yb
71	¹⁶⁹Lu	¹⁸⁰Lu
72	¹⁷⁰Hf	¹⁸⁰Hf
73	¹⁷¹Ta	¹⁸⁰Ta
74	¹⁷²W	¹⁸⁰W
75	¹⁷³Re	¹⁸⁰Re
76	¹⁷⁴Os	¹⁸⁰Os
77	¹⁷⁵Ir	¹⁸⁰Ir
78	¹⁷⁶Pt	¹⁸⁰Pt
79	¹⁷⁷Au	¹⁸⁰Au
80	¹⁷⁸Hg	¹⁸⁰Hg
81	¹⁷⁹Tl	¹⁸⁰Tl
82	¹⁸⁰Pb	¹⁸⁰Pb