Lutetium-154m1

Properties and data of the isotope ^154m1Lu.

Contents

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

General data

Name of the isotope:Lutetium-154m1; Lu-154m1Symbol:^154m1Lu or 154m171LuMass number A:154 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:83Isotopic mass:153.95736(21) u (atomic weight of Lutetium-154m1)
Excitation energy: +xNuclide mass:153.9184145 u (calculated nuclear mass without electrons)Mass excess:-39.7189 MeVMass defect:1.3174053 u (per nucleus)Nuclear binding energy:1227.15513252 MeV (per nucleus)
7.96853982 MeV (average binding energy per nucleon)Half-life:1.12(8) sDecay constant λ:0.61888141121424 s^-1Specific activity α:2.435941852240 × 10⁺²¹ Bq g^-1
65836266276.781 Ci g^-1Spin and parity:
(nuclear angular momentum)(9+)

Radioactive Decay

Half-life T_½ = 1.12(8) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EC/β⁺	¹⁵⁴Yb	100 %
EC, p

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
¹⁵⁴Lu			(2-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 83) and isobaric (same nucleon number A = 154) with Lutetium-154m1. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 83	Isobar A = 154
46	¹²⁹Pd
47	¹³⁰Ag
48	¹³¹Cd
49	¹³²In
50	¹³³Sn
51	¹³⁴Sb
52	¹³⁵Te
53	¹³⁶I
54	¹³⁷Xe
55	¹³⁸Cs
56	¹³⁹Ba
57	¹⁴⁰La	¹⁵⁴La
58	¹⁴¹Ce	¹⁵⁴Ce
59	¹⁴²Pr	¹⁵⁴Pr
60	¹⁴³Nd	¹⁵⁴Nd
61	¹⁴⁴Pm	¹⁵⁴Pm
62	¹⁴⁵Sm	¹⁵⁴Sm
63	¹⁴⁶Eu	¹⁵⁴Eu
64	¹⁴⁷Gd	¹⁵⁴Gd
65	¹⁴⁸Tb	¹⁵⁴Tb
66	¹⁴⁹Dy	¹⁵⁴Dy
67	¹⁵⁰Ho	¹⁵⁴Ho
68	¹⁵¹Er	¹⁵⁴Er
69	¹⁵²Tm	¹⁵⁴Tm
70	¹⁵³Yb	¹⁵⁴Yb
71	¹⁵⁴Lu	¹⁵⁴Lu
72	¹⁵⁵Hf	¹⁵⁴Hf
73	¹⁵⁶Ta
74	¹⁵⁷W