Lutetium-172
Properties and data of the isotope 172Lu.
See also: list of Lutetium isotopes.
General data
Name of the isotope:Lutetium-172; Lu-172Symbol:172Lu or 17271LuMass number A:172 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:101Isotopic mass:171.9390914(25) u (atomic weight of Lutetium-172)Nuclide mass:171.9001459 u (calculated nuclear mass without electrons)Mass excess:-56.736 MeVMass defect:1.491642388 u (per nucleus)Nuclear binding energy:1389.45593457 MeV (per nucleus)
8.07823218 MeV (average binding energy per nucleon)Separation energy:SN = 6.9789(26) MeV (first neutron)
SP = 4.7181(23) MeV (first proton)Half-life:6.70(3) dDecay constant λ:1.197393554035 × 10-6 s-1Specific activity α:4.216884588994 × 10+15 Bq g-1
113969.85375661 Ci g-1Spin and parity:
(nuclear angular momentum)4-Magnetic dipole moment:μ(μN) = 2.25(10)Quadrupole moment Q:3.80(7) barn (100 fm2)Nuclear g-factor:gl = 0.5625Charge radius:5.3486(302) femtometer fmYear of discovery:1951
Radioactive Decay
Half-life T½ = 6.70(3) d respectively 5.78880 × 105 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EE/β+ | 172Yb | 100 % | 2.5195(23) MeV | |
Parent Nuclides
Direct parent isotope is: 172Hf.
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 |
---|
172m1Lu | 41.86(4) keV | 3.7(5) min | 1- |
172m2Lu | 65.79(4) keV | 0.332(20) μs | (1)+ |
172m3Lu | 109.41(10) keV | 440(12) μs | (1)+ |
172m4Lu | 213.57(17) keV | 150 ns | (6-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 101) and isobaric (same nucleon number A = 172) with Lutetium-172. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
OZ | Isotone N = 101 | Isobar A = 172 |
59 | 160Pr | |
60 | 161Nd | |
61 | 162Pm | |
62 | 163Sm | |
63 | 164Eu | |
64 | 165Gd | |
65 | 166Tb | 172Tb |
66 | 167Dy | 172Dy |
67 | 168Ho | 172Ho |
68 | 169Er | 172Er |
69 | 170Tm | 172Tm |
70 | 171Yb | 172Yb |
71 | 172Lu | 172Lu |
72 | 173Hf | 172Hf |
73 | 174Ta | 172Ta |
74 | 175W | 172W |
75 | 176Re | 172Re |
76 | 177Os | 172Os |
77 | 178Ir | 172Ir |
78 | 179Pt | 172Pt |
79 | 180Au | 172Au |
80 | 181Hg | 172Hg |
81 | 182Tl | |
82 | 183Pb | |
83 | 184Bi | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/lutetium-172
© 1996 - 2024 ChemLin