Iodine-143

Properties and data of the isotope ¹⁴³I.

Content

General data

Name of the isotope:Iodine-143; I-143Other names:Jod-143Symbol:¹⁴³I or 14353IMass number A:143 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:90Isotopic mass:142.94565(21) u (atomic weight of Iodine-143)Nuclide mass:142.9165771 u (calculated nuclear mass without electrons)Mass excess:-50.6267 MeVMass defect:1.248919136 u (per nucleus)Nuclear binding energy:1163.36068167 MeV (per nucleus)
8.13538938 MeV (average binding energy per nucleon)Separation energy:S_N = 3.93(42) MeV (first neutron)
S_P = 11.55(54) MeV (first proton)Half-life:130(45) msDecay constant λ:5.3319013889227 s^-1Specific activity α:2.261229663055 × 10⁺²² Bq g^-1
611143152177.11 Ci g^-1Spin and parity:
(nuclear angular momentum)Year of discovery:1994

Radioactive Decay

Half-life T_½ = 130(45) ms respectively 1.30 × 10^-1 seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β^-	¹⁴³Xe	?

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 90) and isobaric (same nucleon number A = 143) with Iodine-143. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 90	Isobar A = 143
51	¹⁴¹Sb
52	¹⁴²Te	¹⁴³Te
53	¹⁴³I	¹⁴³I
54	¹⁴⁴Xe	¹⁴³Xe
55	¹⁴⁵Cs	¹⁴³Cs
56	¹⁴⁶Ba	¹⁴³Ba
57	¹⁴⁷La	¹⁴³La
58	¹⁴⁸Ce	¹⁴³Ce
59	¹⁴⁹Pr	¹⁴³Pr
60	¹⁵⁰Nd	¹⁴³Nd
61	¹⁵¹Pm	¹⁴³Pm
62	¹⁵²Sm	¹⁴³Sm
63	¹⁵³Eu	¹⁴³Eu
64	¹⁵⁴Gd	¹⁴³Gd
65	¹⁵⁵Tb	¹⁴³Tb
66	¹⁵⁶Dy	¹⁴³Dy
67	¹⁵⁷Ho	¹⁴³Ho
68	¹⁵⁸Er	¹⁴³Er
69	¹⁵⁹Tm
70	¹⁶⁰Yb
71	¹⁶¹Lu
72	¹⁶²Hf
73	¹⁶³Ta
74	¹⁶⁴W
75	¹⁶⁵Re
76	¹⁶⁶Os
77	¹⁶⁷Ir
78	¹⁶⁸Pt