Dysprosium-159
Properties and data of the isotope 159Dy.
See also: list of Dysprosium isotopes.
General data
Name of the isotope:Dysprosium-159; Dy-159Symbol:159Dy or 15966DyMass number A:159 (= number of nucleons)Atomic number Z:66 (= number of protons)Neutrons N:93Isotopic mass:158.9257460(16) u (atomic weight of Dysprosium-159)Nuclide mass:158.8895428 u (calculated nuclear mass without electrons)Mass excess:-69.16716 MeVMass defect:1.3965433 u (per nucleus)Nuclear binding energy:1300.87170469 MeV (per nucleus)
8.18158305 MeV (average binding energy per nucleon)Separation energy:SN = 6.8311(26) MeV (first neutron)
SP = 6.9854(13) MeV (first proton)Half-life:144.4(2) dDecay constant λ:5.555773415537 × 10-8 s-1Specific activity α:2.117572790775 × 10+14 Bq g-1
5723.1697047997 Ci g-1Spin and parity:
(nuclear angular momentum)3/2-Magnetic dipole moment:μ(μN) = - 0.354(3)Quadrupole moment Q:+ 1.37(2) barn (100 fm2)Nuclear g-factor:gl = -0.236Charge radius:5.1825(3031) femtometer fmYear of discovery:1951
Radioactive Decay
Half-life T½ = 144.4(2) d respectively 1.2476160 × 107 seconds s.
Decay mode | Daughter | Probability | Decay energy | γ energy (intensity) |
---|
EC | 159Tb | 100 % | 0.3652(20) MeV | |
Parent Nuclides
Direct parent isotope is: 159Ho.
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 |
---|
159mDy | 352.77(14) keV | 122(3) μs | 11/2- |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 93) and isobaric (same nucleon number A = 159) with Dysprosium-159. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 93 | Isobar A = 159 |
54 | 147Xe | |
55 | 148Cs | |
56 | 149Ba | |
57 | 150La | |
58 | 151Ce | |
59 | 152Pr | 159Pr |
60 | 153Nd | 159Nd |
61 | 154Pm | 159Pm |
62 | 155Sm | 159Sm |
63 | 156Eu | 159Eu |
64 | 157Gd | 159Gd |
65 | 158Tb | 159Tb |
66 | 159Dy | 159Dy |
67 | 160Ho | 159Ho |
68 | 161Er | 159Er |
69 | 162Tm | 159Tm |
70 | 163Yb | 159Yb |
71 | 164Lu | 159Lu |
72 | 165Hf | 159Hf |
73 | 166Ta | 159Ta |
74 | 167W | 159W |
75 | 168Re | 159Re |
76 | 169Os | |
77 | 170Ir | |
78 | 171Pt | |
79 | 172Au | |
80 | 173Hg | |
External data and identifiers
Last update: 2020-10-08
Perma link: https://www.chemlin.org/isotope/dysprosium-159
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