Dysprosium-156
Properties and data of the isotope 156Dy.
See also: list of Dysprosium isotopes.
General data
Name of the isotope:Dysprosium-156; Dy-156Symbol:156Dy or 15666DyMass number A:156 (= number of nucleons)Atomic number Z:66 (= number of protons)Neutrons N:90Isotopic mass:155.92428(2) u (atomic weight of Dysprosium-156)Nuclide mass:155.8880768 u (calculated nuclear mass without electrons)Mass excess:-70.53273 MeVMass defect:1.372014552 u (per nucleus)Nuclear binding energy:1278.0233231 MeV (per nucleus)
8.1924572 MeV (average binding energy per nucleon)Separation energy:SN = 9.445(10) MeV (first neutron)
SP = 6.568(10) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.1622(2869) femtometer fmYear of discovery:1948
Parent Nuclides
Direct parent isotope is: 156Ho.
Occurrence
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+ |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 90) and isobaric (same nucleon number A = 156) with Dysprosium-156. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
Z | Isotone N = 90 | Isobar A = 156 |
51 | 141Sb | |
52 | 142Te | |
53 | 143I | |
54 | 144Xe | |
55 | 145Cs | |
56 | 146Ba | |
57 | 147La | 156La |
58 | 148Ce | 156Ce |
59 | 149Pr | 156Pr |
60 | 150Nd | 156Nd |
61 | 151Pm | 156Pm |
62 | 152Sm | 156Sm |
63 | 153Eu | 156Eu |
64 | 154Gd | 156Gd |
65 | 155Tb | 156Tb |
66 | 156Dy | 156Dy |
67 | 157Ho | 156Ho |
68 | 158Er | 156Er |
69 | 159Tm | 156Tm |
70 | 160Yb | 156Yb |
71 | 161Lu | 156Lu |
72 | 162Hf | 156Hf |
73 | 163Ta | 156Ta |
74 | 164W | 156W |
75 | 165Re | |
76 | 166Os | |
77 | 167Ir | |
78 | 168Pt | |
External data and identifiers
Last update: 2020-10-08
Perma link: https://www.chemlin.org/isotope/dysprosium-156
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