Thulium-170
Properties and data of the isotope 170Tm.
See also: list of Thulium isotopes.
General data
Name of the isotope:Thulium-170; Tm-170Symbol:170Tm or 17069TmMass number A:170 (= number of nucleons)Atomic number Z:69 (= number of protons)Neutrons N:101Isotopic mass:169.9358065(9) u (atomic weight of Thulium-170)Nuclide mass:169.8979579 u (calculated nuclear mass without electrons)Mass excess:-59.79586 MeVMass defect:1.479277224 u (per nucleus)Nuclear binding energy:1377.93785849 MeV (per nucleus)
8.10551681 MeV (average binding energy per nucleon)Separation energy:SN = 6.59196(17) MeV (first neutron)
SP = 6.1617(11) MeV (first proton)Half-life:128.6(3) dDecay constant λ:6.238364550572 × 10-8 s-1Specific activity α:2.22297692657 × 10+14 Bq g-1
6008.0457475108 Ci g-1Spin and parity:
(nuclear angular momentum)1-Magnetic dipole moment:μ(μN) = + 0.2468(12)Quadrupole moment Q:+ 0.74(2) barn (100 fm2)Nuclear g-factor:gl = 0.2468Charge radius:5.2303(36) femtometer fmYear of discovery:1936
Radioactive Decay
Half-life T½ = 128.6(3) d respectively 1.1111040 × 107 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC | 170Er | 0.131(10) % | 0.3128(17) MeV | |
| β- | 170Yb | 99.869(10) % | 0.9681(8) MeV | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 101) and isobaric (same nucleon number A = 170) with Thulium-170. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 101 | Isobar A = 170 |
|---|
| 59 | 160Pr | |
| 60 | 161Nd | |
| 61 | 162Pm | |
| 62 | 163Sm | |
| 63 | 164Eu | |
| 64 | 165Gd | 170Gd |
| 65 | 166Tb | 170Tb |
| 66 | 167Dy | 170Dy |
| 67 | 168Ho | 170Ho |
| 68 | 169Er | 170Er |
| 69 | 170Tm | 170Tm |
| 70 | 171Yb | 170Yb |
| 71 | 172Lu | 170Lu |
| 72 | 173Hf | 170Hf |
| 73 | 174Ta | 170Ta |
| 74 | 175W | 170W |
| 75 | 176Re | 170Re |
| 76 | 177Os | 170Os |
| 77 | 178Ir | 170Ir |
| 78 | 179Pt | 170Pt |
| 79 | 180Au | 170Au |
| 80 | 181Hg | |
| 81 | 182Tl | |
| 82 | 183Pb | |
| 83 | 184Bi | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/thulium-170
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