Erbium-160

Properties and data of the isotope ¹⁶⁰Er.

Content

General data

Name of the isotope:Erbium-160; Er-160Symbol:¹⁶⁰Er or 16068ErMass number A:160 (= number of nucleons)Atomic number Z:68 (= number of protons)Neutrons N:92Isotopic mass:159.929077(26) u (atomic weight of Erbium-160)Nuclide mass:159.8917769 u (calculated nuclear mass without electrons)Mass excess:-66.06435 MeVMass defect:1.400197448 u (per nucleus)Nuclear binding energy:1304.27552163 MeV (per nucleus)
8.15172201 MeV (average binding energy per nucleon)Separation energy:S_N = 9.575(25) MeV (first neutron)
S_P = 6.024(24) MeV (first proton)Half-life:28.58(9) hDecay constant λ:6.736909849155 × 10^-6 s^-1Specific activity α:2.551611325302 × 10⁺¹⁶ Bq g^-1
689624.68251422 Ci g^-1Spin and parity:
(nuclear angular momentum)0+Charge radius:5.2045(336) femtometer fmYear of discovery:1954

Radioactive Decay

Half-life T_½ = 28.58(9) h (hours) respectively 1.02888 × 10⁵ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE	¹⁶⁰Ho	100 %	0.319(29) MeV

Parent Nuclides

Direct parent isotope is: ¹⁶⁰Tm.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 92) and isobaric (same nucleon number A = 160) with Erbium-160. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 92	Isobar A = 160
53	¹⁴⁵I
54	¹⁴⁶Xe
55	¹⁴⁷Cs
56	¹⁴⁸Ba
57	¹⁴⁹La
58	¹⁵⁰Ce
59	¹⁵¹Pr	¹⁶⁰Pr
60	¹⁵²Nd	¹⁶⁰Nd
61	¹⁵³Pm	¹⁶⁰Pm
62	¹⁵⁴Sm	¹⁶⁰Sm
63	¹⁵⁵Eu	¹⁶⁰Eu
64	¹⁵⁶Gd	¹⁶⁰Gd
65	¹⁵⁷Tb	¹⁶⁰Tb
66	¹⁵⁸Dy	¹⁶⁰Dy
67	¹⁵⁹Ho	¹⁶⁰Ho
68	¹⁶⁰Er	¹⁶⁰Er
69	¹⁶¹Tm	¹⁶⁰Tm
70	¹⁶²Yb	¹⁶⁰Yb
71	¹⁶³Lu	¹⁶⁰Lu
72	¹⁶⁴Hf	¹⁶⁰Hf
73	¹⁶⁵Ta	¹⁶⁰Ta
74	¹⁶⁶W	¹⁶⁰W
75	¹⁶⁷Re	¹⁶⁰Re
76	¹⁶⁸Os
77	¹⁶⁹Ir
78	¹⁷⁰Pt
79	¹⁷¹Au
80	¹⁷²Hg