See also: List of individual Dysprosium isotopes (and general data sources).
General data
Name of the isotope:Dysprosium-163; Dy-163Symbol:163Dy or 16366DyMass number A:163 (= number of nucleons)Atomic number Z:66 (= number of protons)Neutrons N:97Nucleon pairing (Z - N):even - oddNuclear ratio (N/Z ratio):1.469696969697 (= neutron-proton ratio)Neutron excess (N-Z):31Isotopic mass:162.92874(2) u (atomic weight of Dysprosium-163)Nuclide mass:162.8925368 u (calculated nuclear mass without electrons)Mass excess:-66.37826 MeVMass defect:1.428208964 u (per nucleus)Nuclear binding energy:1330.36808071 MeV (per nucleus) 8.16176737 MeV (average binding energy per nucleon)Separation energy:SN = 6.27101(5) MeV (first neutron) SP = 7.99(4) MeV (first proton)Half-life:stableSpin and parity: (nuclear angular momentum)5/2-Magnetic dipole moment:μ(μN) = + 0.6726(35)Charge radius:5.2099(120) femtometer fmYear of discovery:1934
Comparison of the natural Dysprosium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):
Atomic Mass ma
Quantity
Half-life
Spin
Dysprosium Isotopic mixture
162.500 u
100 %
Isotope 156Dy
155.92428(2) u
0.056(3) %
stable
0+
Isotope 158Dy
157.92442(2) u
0.095(3) %
stable
0+
Isotope 160Dy
159.92520(2) u
2.329(18) %
stable
0+
Isotope 161Dy
160.92694(2) u
18.889(42) %
stable
5/2+
Isotope 162Dy
161.92681(2) u
25.475(36) %
stable
0+
Isotope 163Dy
162.92874(2) u
24.896(42) %
stable
5/2-
Isotope 164Dy
163.92918(2) u
28.260(54) %
stable
0+
NMR data
Nuclear magnetic properties and parameters of the NMR active Nuclide163Dy
Isotope:163Dy-NMRQuantity:24.896(42) %Spin:5/2-Nuclearmagnetic moment μ/μN:+ 0.6726(35)Gyromagnetic ratio γ:1.275 · 107 rad T-1 s-1 2.02923 MHz T-1Nuclear g-factor:gl = 0.26904Quadrupole moment Q:+2.648(21) barn (100 fm2)Line width parameter (factor):l = 22438.09 fm4Resonance frequency:v0 = 2.0508 MHz at 1 TRelative Sensitivity:[related to 1H = 1.000]: 0.00130 (H0 = const.) 0.5619 (v0 = const.)
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 97) and isobaric (same nucleon number A = 163) with Dysprosium-163. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
