Dysprosium-160

Properties and data of the isotope ¹⁶⁰Dy.

Contents

See also: List of individual Dysprosium isotopes (and general data sources).

General data

Name of the isotope:Dysprosium-160; Dy-160Symbol:¹⁶⁰Dy or 16066DyMass number A:160 (= number of nucleons)Atomic number Z:66 (= number of protons)Neutrons N:94Nucleon pairing (Z - N):even - evenNuclear ratio (N/Z ratio):1.4242424242424 (= neutron-proton ratio)Neutron excess (N-Z):28Isotopic mass:159.92520(2) u (atomic weight of Dysprosium-160)Nuclide mass:159.8889968 u (calculated nuclear mass without electrons)Mass excess:-69.67575 MeVMass defect:1.405754216 u (per nucleus)Nuclear binding energy:1309.45161768 MeV (per nucleus)
8.18407261 MeV (average binding energy per nucleon)Separation energy:S_N = 8.5769(14) MeV (first neutron)
S_P = 7.4293(12) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)0+Charge radius:5.1951(3139) femtometer fmYear of discovery:1938

Parent Nuclides

Direct parent isotopes are: ¹⁶⁰Ho, ¹⁶⁰Tb.

Occurrence

Comparison of the natural Dysprosium isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

	Atomic Mass m_a	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 = 94) and isobaric (same nucleon number A = 160) with Dysprosium-160. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

Z	Isotone N = 94	Isobar A = 160
54	¹⁴⁸Xe
55	¹⁴⁹Cs
56	¹⁵⁰Ba
57	¹⁵¹La
58	¹⁵²Ce
59	¹⁵³Pr	¹⁶⁰Pr
60	¹⁵⁴Nd	¹⁶⁰Nd
61	¹⁵⁵Pm	¹⁶⁰Pm
62	¹⁵⁶Sm	¹⁶⁰Sm
63	¹⁵⁷Eu	¹⁶⁰Eu
64	¹⁵⁸Gd	¹⁶⁰Gd
65	¹⁵⁹Tb	¹⁶⁰Tb
66	¹⁶⁰Dy	¹⁶⁰Dy
67	¹⁶¹Ho	¹⁶⁰Ho
68	¹⁶²Er	¹⁶⁰Er
69	¹⁶³Tm	¹⁶⁰Tm
70	¹⁶⁴Yb	¹⁶⁰Yb
71	¹⁶⁵Lu	¹⁶⁰Lu
72	¹⁶⁶Hf	¹⁶⁰Hf
73	¹⁶⁷Ta	¹⁶⁰Ta
74	¹⁶⁸W	¹⁶⁰W
75	¹⁶⁹Re	¹⁶⁰Re
76	¹⁷⁰Os	¹⁶⁰Os
77	¹⁷¹Ir
78	¹⁷²Pt
79	¹⁷³Au
80	¹⁷⁴Hg