Iodine-116

Properties and data of the isotope ¹¹⁶I.

Content

General data

Name of the isotope:Iodine-116; I-116Other names:Jod-116Symbol:¹¹⁶I or 11653IMass number A:116 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:63Isotopic mass:115.91681(10) u (atomic weight of Iodine-116)Nuclide mass:115.8877371 u (calculated nuclear mass without electrons)Mass excess:-77.49099 MeVMass defect:1.043806404 u (per nucleus)Nuclear binding energy:972.29940249 MeV (per nucleus)
8.3818914 MeV (average binding energy per nucleon)Separation energy:S_N = 9.23(10) MeV (first neutron)
S_P = 2.72(10) MeV (first proton)Half-life:2.91(15) sDecay constant λ:0.23819490740892 s^-1Specific activity α:1.247341986553 × 10⁺²¹ Bq g^-1
33711945582.516 Ci g^-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1976

Radioactive Decay

Half-life T_½ = 2.91(15) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹⁶Te		7.78(10) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁶Xe.

Nuclear Isomers

Nuclear isomers or excited states with the activation energy in keV related to the ground state.

Nuclear Isomer	Excitation Energy	Half-life	Spin
^116mI	430.4(5) keV	3.27 μs	(7-)

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 63) and isobaric (same nucleon number A = 116) with Iodine-116. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 63	Isobar A = 116
35	⁹⁸Br
36	⁹⁹Kr
37	¹⁰⁰Rb
38	¹⁰¹Sr
39	¹⁰²Y
40	¹⁰³Zr
41	¹⁰⁴Nb
42	¹⁰⁵Mo	¹¹⁶Mo
43	¹⁰⁶Tc	¹¹⁶Tc
44	¹⁰⁷Ru	¹¹⁶Ru
45	¹⁰⁸Rh	¹¹⁶Rh
46	¹⁰⁹Pd	¹¹⁶Pd
47	¹¹⁰Ag	¹¹⁶Ag
48	¹¹¹Cd	¹¹⁶Cd
49	¹¹²In	¹¹⁶In
50	¹¹³Sn	¹¹⁶Sn
51	¹¹⁴Sb	¹¹⁶Sb
52	¹¹⁵Te	¹¹⁶Te
53	¹¹⁶I	¹¹⁶I
54	¹¹⁷Xe	¹¹⁶Xe
55	¹¹⁸Cs	¹¹⁶Cs
56	¹¹⁹Ba	¹¹⁶Ba
57	¹²⁰La	¹¹⁶La
58	¹²¹Ce
59	¹²²Pr