Iodine-112

Properties and data of the isotope ¹¹²I.

Content

General data

Name of the isotope:Iodine-112; I-112Other names:Jod-112Symbol:¹¹²I or 11253IMass number A:112 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:59Isotopic mass:111.928005(11) u (atomic weight of Iodine-112)Nuclide mass:111.8989321 u (calculated nuclear mass without electrons)Mass excess:-67.06291 MeVMass defect:0.99795174 u (per nucleus)Nuclear binding energy:929.5860581 MeV (per nucleus)
8.29987552 MeV (average binding energy per nucleon)Separation energy:S_N = 10.181(11) MeV (first neutron)
S_P = 0.765(12) MeV (first proton)Half-life:3.34(8) sDecay constant λ:0.20752909597603 s^-1Specific activity α:1.125918422074 × 10⁺²¹ Bq g^-1
30430227623.643 Ci g^-1Spin and parity:
(nuclear angular momentum)(1+)Year of discovery:1977

Radioactive Decay

Half-life T_½ = 3.34(8) s.

Decay mode	Daughter	Probability	Decay energy
EE/β⁺	¹¹²Te	99.01 %	10.504(13) MeV
EE, p	¹¹¹Sb	0.88 %
EE, α	¹⁰⁹Sn	0.104 %
α	¹⁰⁸Sb	0.0012 %	2,957(12) MeV

Parent Nuclides

Direct parent isotope is: ¹¹²Xe.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 59) and isobaric (same nucleon number A = 112) with Iodine-112. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 59	Isobar A = 112
33	⁹²As
34	⁹³Se
35	⁹⁴Br
36	⁹⁵Kr
37	⁹⁶Rb
38	⁹⁷Sr
39	⁹⁸Y
40	⁹⁹Zr	¹¹²Zr
41	¹⁰⁰Nb	¹¹²Nb
42	¹⁰¹Mo	¹¹²Mo
43	¹⁰²Tc	¹¹²Tc
44	¹⁰³Ru	¹¹²Ru
45	¹⁰⁴Rh	¹¹²Rh
46	¹⁰⁵Pd	¹¹²Pd
47	¹⁰⁶Ag	¹¹²Ag
48	¹⁰⁷Cd	¹¹²Cd
49	¹⁰⁸In	¹¹²In
50	¹⁰⁹Sn	¹¹²Sn
51	¹¹⁰Sb	¹¹²Sb
52	¹¹¹Te	¹¹²Te
53	¹¹²I	¹¹²I
54	¹¹³Xe	¹¹²Xe
55	¹¹⁴Cs	¹¹²Cs
56	¹¹⁵Ba
57	¹¹⁶La