Thulium-162
Properties and data of the isotope 162Tm.
See also: List of individual Thulium isotopes (and general data sources).
General data
Name of the isotope:Thulium-162; Tm-162Symbol:162Tm or 16269TmMass number A:162 (= number of nucleons)Atomic number Z:69 (= number of protons)Neutrons N:93Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.3478260869565 (= neutron-proton ratio)Neutron excess (N-Z):24Isotopic mass:161.934001(28) u (atomic weight of Thulium-162)Nuclide mass:161.8961524 u (calculated nuclear mass without electrons)Mass excess:-61.47767 MeVMass defect:1.411763396 u (per nucleus)Nuclear binding energy:1315.04913279 MeV (per nucleus)
8.11758724 MeV (average binding energy per nucleon)Separation energy:SN = 7.65(4) MeV (first neutron)
SP = 3.565(27) MeV (first proton)Half-life:21.70(19) minDecay constant λ:0.00053237110642085 s-1Specific activity α:1.99131291467 × 10+18 Bq g-1
53819267.964189 Ci g-1Spin and parity:
(nuclear angular momentum)1-Magnetic dipole moment:μ(μN) = + 0.068(8)Quadrupole moment Q:+ 0.69(3) barn (100 fm2)Nuclear g-factor:gl = 0.068Charge radius:5.1713(47) femtometer fmYear of discovery:1963
Radioactive Decay
Half-life T½ = 21.70(19) min (minutes) respectively 1.302 × 103 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 162Er | 100 % | 4.857(26) MeV | |
Parent Nuclides
Direct parent isotope is: 162Yb.
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 |
|---|
| 162mTm | +x keV | 24.3(17) s | 5+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 93) and isobaric (same nucleon number A = 162) with Thulium-162. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 93 | Isobar A = 162 |
|---|
| 54 | 147Xe | |
| 55 | 148Cs | |
| 56 | 149Ba | |
| 57 | 150La | |
| 58 | 151Ce | |
| 59 | 152Pr | |
| 60 | 153Nd | 162Nd |
| 61 | 154Pm | 162Pm |
| 62 | 155Sm | 162Sm |
| 63 | 156Eu | 162Eu |
| 64 | 157Gd | 162Gd |
| 65 | 158Tb | 162Tb |
| 66 | 159Dy | 162Dy |
| 67 | 160Ho | 162Ho |
| 68 | 161Er | 162Er |
| 69 | 162Tm | 162Tm |
| 70 | 163Yb | 162Yb |
| 71 | 164Lu | 162Lu |
| 72 | 165Hf | 162Hf |
| 73 | 166Ta | 162Ta |
| 74 | 167W | 162W |
| 75 | 168Re | 162Re |
| 76 | 169Os | 162Os |
| 77 | 170Ir | |
| 78 | 171Pt | |
| 79 | 172Au | |
| 80 | 173Hg | |
External data and identifiers
Last update: 2020-10-11
Perma link: https://www.chemlin.org/isotope/thulium-162
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