Lutetium-170
Properties and data of the isotope 170Lu.
See also: List of individual Lutetium isotopes (and general data sources).
General data
Name of the isotope:Lutetium-170; Lu-170Symbol:170Lu or 17071LuMass number A:170 (= number of nucleons)Atomic number Z:71 (= number of protons)Neutrons N:99Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3943661971831 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:169.938479(18) u (atomic weight of Lutetium-170)Nuclide mass:169.8995335 u (calculated nuclear mass without electrons)Mass excess:-57.30644 MeVMass defect:1.474924956 u (per nucleus)Nuclear binding energy:1373.88374696 MeV (per nucleus)
8.0816691 MeV (average binding energy per nucleon)Separation energy:SN = 7.293(17) MeV (first neutron)
SP = 4.218(17) MeV (first proton)Half-life:2.012(20) dDecay constant λ:3.987344339978 × 10-6 s-1Specific activity α:1.42084906937 × 10+16 Bq g-1
384013.26199297 Ci g-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.3364(302) femtometer fmYear of discovery:1951
Radioactive Decay
Half-life T½ = 2.012(20) d respectively 1.738368 × 105 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 170Yb | 100 % | 3.458(17) MeV | |
Parent Nuclides
Direct parent isotope is: 170Hf.
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 |
|---|
| 170mLu | 92.91(9) keV | 0.67(10) s | (4)- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 99) and isobaric (same nucleon number A = 170) with Lutetium-170. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 99 | Isobar A = 170 |
|---|
| 56 | 155Ba | |
| 57 | 156La | |
| 58 | 157Ce | |
| 59 | 158Pr | |
| 60 | 159Nd | |
| 61 | 160Pm | |
| 62 | 161Sm | |
| 63 | 162Eu | |
| 64 | 163Gd | 170Gd |
| 65 | 164Tb | 170Tb |
| 66 | 165Dy | 170Dy |
| 67 | 166Ho | 170Ho |
| 68 | 167Er | 170Er |
| 69 | 168Tm | 170Tm |
| 70 | 169Yb | 170Yb |
| 71 | 170Lu | 170Lu |
| 72 | 171Hf | 170Hf |
| 73 | 172Ta | 170Ta |
| 74 | 173W | 170W |
| 75 | 174Re | 170Re |
| 76 | 175Os | 170Os |
| 77 | 176Ir | 170Ir |
| 78 | 177Pt | 170Pt |
| 79 | 178Au | 170Au |
| 80 | 179Hg | 170Hg |
| 81 | 180Tl | |
| 82 | 181Pb | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/lutetium-170
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