Lutetium-182

Properties and data of the isotope ¹⁸²Lu.

Contents

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

General data

Name of the isotope:Lutetium-182; Lu-182Symbol:¹⁸²Lu or 18271LuMass number A:182 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:111Isotopic mass:181.95504(21) u (atomic weight of Lutetium-182)Nuclide mass:181.9160945 u (calculated nuclear mass without electrons)Mass excess:-41.87997 MeVMass defect:1.562342948 u (per nucleus)Nuclear binding energy:1455.313082 MeV (per nucleus)
7.99622573 MeV (average binding energy per nucleon)Separation energy:S_N = 5.515(23) MeV (first neutron)
S_P = 8.08(36) MeV (first proton)Half-life:2.0(2) minDecay constant λ:0.0057762265046662 s^-1Specific activity α:1.921836997237 × 10⁺¹⁹ Bq g^-1
519415404.65881 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1982

Radioactive Decay

Half-life T_½ = 2.0(2) min (minutes) respectively 1.20 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁸²Hf	100 %	4.17(20) MeV

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 111) and isobaric (same nucleon number A = 182) with Lutetium-182. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

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