Lutetium-150m

Properties and data of the isotope ¹⁵⁰Lu.

Content

General data

Name of the isotope:Lutetium-150m; Lu-150mSymbol:¹⁵⁰Lu or 15071LuMass number A:150 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:79Isotopic mass:149.97355(32) u (atomic weight of Lutetium-150m)
Excitation energy: 22(6) keVNuclide mass:149.9346045 u (calculated nuclear mass without electrons)Mass excess:-24.63802 MeVMass defect:1.266555636 u (per nucleus)Nuclear binding energy:1179.7889756 MeV (per nucleus)
7.86525984 MeV (average binding energy per nucleon)Half-life:39 μsDecay constant λ:17773.004629742 s^-1Specific activity α:7.183324656685 × 10⁺²⁵ Bq g^-1
1.941439096401 × 10⁺¹⁵ Ci g^-1Spin and parity:
(nuclear angular momentum)(1-.2-)

Radioactive Decay

Half-life T_½ = 39 μs respectively 3.9 × 10^-5 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
p	¹⁴⁹Yb	100 %

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
¹⁵⁰Lu		0.045(3) s	(2+)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 79) and isobaric (same nucleon number A = 150) with Lutetium-150m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 79	Isobar A = 150
44	¹²³Ru
45	¹²⁴Rh
46	¹²⁵Pd
47	¹²⁶Ag
48	¹²⁷Cd
49	¹²⁸In
50	¹²⁹Sn
51	¹³⁰Sb
52	¹³¹Te
53	¹³²I
54	¹³³Xe
55	¹³⁴Cs	¹⁵⁰Cs
56	¹³⁵Ba	¹⁵⁰Ba
57	¹³⁶La	¹⁵⁰La
58	¹³⁷Ce	¹⁵⁰Ce
59	¹³⁸Pr	¹⁵⁰Pr
60	¹³⁹Nd	¹⁵⁰Nd
61	¹⁴⁰Pm	¹⁵⁰Pm
62	¹⁴¹Sm	¹⁵⁰Sm
63	¹⁴²Eu	¹⁵⁰Eu
64	¹⁴³Gd	¹⁵⁰Gd
65	¹⁴⁴Tb	¹⁵⁰Tb
66	¹⁴⁵Dy	¹⁵⁰Dy
67	¹⁴⁶Ho	¹⁵⁰Ho
68	¹⁴⁷Er	¹⁵⁰Er
69	¹⁴⁸Tm	¹⁵⁰Tm
70	¹⁴⁹Yb	¹⁵⁰Yb
71	¹⁵⁰Lu	¹⁵⁰Lu