Holmium-162
Properties and data of the isotope 162Ho.
See also: List of individual Holmium isotopes (and general data sources).
General data
Name of the isotope:Holmium-162; Ho-162Symbol:162Ho or 16267HoMass number A:162 (= number of nucleons)Atomic number Z:67 (= number of protons)Neutrons N:95Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4179104477612 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:161.929101(3) u (atomic weight of Holmium-162)Nuclide mass:161.8923493 u (calculated nuclear mass without electrons)Mass excess:-66.04199 MeVMass defect:1.418343164 u (per nucleus)Nuclear binding energy:1321.17814721 MeV (per nucleus)
8.15542066 MeV (average binding energy per nucleon)Separation energy:SN = 6.916(4) MeV (first neutron)
SP = 5.275(3) MeV (first proton)Half-life:15.0(10) minDecay constant λ:0.00077016353395549 s-1Specific activity α:2.880766016563 × 10+18 Bq g-1
77858540.988192 Ci g-1Spin and parity:
(nuclear angular momentum)1+Magnetic dipole moment:μ(μN) = 2.32(3)Quadrupole moment Q:0.71(3) barn (100 fm2)Nuclear g-factor:gl = 2.32Charge radius:5.1817(313) femtometer fmYear of discovery:1957
Radioactive Decay
Half-life T½ = 15.0(10) min (minutes) respectively 9.00 × 102 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| EC/β+ | 162Dy | 100 % | 2.140(3) MeV | |
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 |
|---|
| 162mHo | 105.87(6) keV | 67.0(7) min | 6- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 95) and isobaric (same nucleon number A = 162) with Holmium-162. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 95 | Isobar A = 162 |
|---|
| 55 | 150Cs | |
| 56 | 151Ba | |
| 57 | 152La | |
| 58 | 153Ce | |
| 59 | 154Pr | |
| 60 | 155Nd | 162Nd |
| 61 | 156Pm | 162Pm |
| 62 | 157Sm | 162Sm |
| 63 | 158Eu | 162Eu |
| 64 | 159Gd | 162Gd |
| 65 | 160Tb | 162Tb |
| 66 | 161Dy | 162Dy |
| 67 | 162Ho | 162Ho |
| 68 | 163Er | 162Er |
| 69 | 164Tm | 162Tm |
| 70 | 165Yb | 162Yb |
| 71 | 166Lu | 162Lu |
| 72 | 167Hf | 162Hf |
| 73 | 168Ta | 162Ta |
| 74 | 169W | 162W |
| 75 | 170Re | 162Re |
| 76 | 171Os | 162Os |
| 77 | 172Ir | |
| 78 | 173Pt | |
| 79 | 174Au | |
| 80 | 175Hg | |
| 81 | 176Tl | |
External data and identifiers
Last update: 2020-10-09
Perma link: https://www.chemlin.org/isotope/holmium-162
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