Lutetium-180

Properties and data of the isotope ¹⁸⁰Lu.

Contents

General data

Name of the isotope:Lutetium-180; Lu-180Symbol:¹⁸⁰Lu or 18071LuMass number A:180 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:109Isotopic mass:179.94989(8) u (atomic weight of Lutetium-180)Nuclide mass:179.9109445 u (calculated nuclear mass without electrons)Mass excess:-46.67716 MeVMass defect:1.550163116 u (per nucleus)Nuclear binding energy:1443.96764158 MeV (per nucleus)
8.02204245 MeV (average binding energy per nucleon)Separation energy:S_N = 5.69(7) MeV (first neutron)
S_P = 7.43(21) MeV (first proton)Half-life:5.7(1) minDecay constant λ:0.0020267461419881 s^-1Specific activity α:6.818631706360 × 10⁺¹⁸ Bq g^-1
184287343.41516 Ci g^-1Spin and parity:
(nuclear angular momentum)5+Year of discovery:1971

Radioactive Decay

Half-life T_½ = 5.7(1) min (minutes) respectively 3.42 × 10² seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁸⁰Hf	100 %	3.10(7) MeV

Parent Nuclides

Direct parent isotope is: ¹⁸⁰Yb.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 109) and isobaric (same nucleon number A = 180) with Lutetium-180. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 109	Isobar A = 180
68	¹⁷⁷Er
69	¹⁷⁸Tm
70	¹⁷⁹Yb	¹⁸⁰Yb
71	¹⁸⁰Lu	¹⁸⁰Lu
72	¹⁸¹Hf	¹⁸⁰Hf
73	¹⁸²Ta	¹⁸⁰Ta
74	¹⁸³W	¹⁸⁰W
75	¹⁸⁴Re	¹⁸⁰Re
76	¹⁸⁵Os	¹⁸⁰Os
77	¹⁸⁶Ir	¹⁸⁰Ir
78	¹⁸⁷Pt	¹⁸⁰Pt
79	¹⁸⁸Au	¹⁸⁰Au
80	¹⁸⁹Hg	¹⁸⁰Hg
81	¹⁹⁰Tl	¹⁸⁰Tl
82	¹⁹¹Pb	¹⁸⁰Pb
83	¹⁹²Bi
84	¹⁹³Po
85	¹⁹⁴At
86	¹⁹⁵Rn