Erbium-143

Properties and data of the isotope ¹⁴³Er.

Content

General data

Name of the isotope:Erbium-143; Er-143Symbol:¹⁴³Er or 14368ErMass number A:143 (= number of nucleons)Atomic number Z:68 (= number of protons)Neutrons N:75Isotopic mass:142.96644(43) u (atomic weight of Erbium-143)Nuclide mass:142.9291399 u (calculated nuclear mass without electrons)Mass excess:-31.26094 MeVMass defect:1.215530876 u (per nucleus)Nuclear binding energy:1132.25971781 MeV (per nucleus)
7.91790012 MeV (average binding energy per nucleon)Separation energy:S_N = 11.30(64) MeV (first neutron)
S_P = 1.30(57) MeV (first proton)Half-life:Spin and parity:
(nuclear angular momentum)0+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 75) and isobaric (same nucleon number A = 143) with Erbium-143. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 75	Isobar A = 143
42	¹¹⁷Mo
43	¹¹⁸Tc
44	¹¹⁹Ru
45	¹²⁰Rh
46	¹²¹Pd
47	¹²²Ag
48	¹²³Cd
49	¹²⁴In
50	¹²⁵Sn
51	¹²⁶Sb
52	¹²⁷Te	¹⁴³Te
53	¹²⁸I	¹⁴³I
54	¹²⁹Xe	¹⁴³Xe
55	¹³⁰Cs	¹⁴³Cs
56	¹³¹Ba	¹⁴³Ba
57	¹³²La	¹⁴³La
58	¹³³Ce	¹⁴³Ce
59	¹³⁴Pr	¹⁴³Pr
60	¹³⁵Nd	¹⁴³Nd
61	¹³⁶Pm	¹⁴³Pm
62	¹³⁷Sm	¹⁴³Sm
63	¹³⁸Eu	¹⁴³Eu
64	¹³⁹Gd	¹⁴³Gd
65	¹⁴⁰Tb	¹⁴³Tb
66	¹⁴¹Dy	¹⁴³Dy
67	¹⁴²Ho	¹⁴³Ho
68	¹⁴³Er	¹⁴³Er
69	¹⁴⁴Tm