Iodine-113

Properties and data of the isotope ¹¹³I.

Content

General data

Name of the isotope:Iodine-113; I-113Other names:Jod-113Symbol:¹¹³I or 11353IMass number A:113 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:60Isotopic mass:112.923650(9) u (atomic weight of Iodine-113)Nuclide mass:112.8945771 u (calculated nuclear mass without electrons)Mass excess:-71.11957 MeVMass defect:1.010971656 u (per nucleus)Nuclear binding energy:941.71403173 MeV (per nucleus)
8.33375249 MeV (average binding energy per nucleon)Separation energy:S_N = 12.127(13) MeV (first neutron)
S_P = 0.841(12) MeV (first proton)Half-life:6.6(2) sDecay constant λ:0.10502230008484 s^-1Specific activity α:5.64695611201 × 10⁺²⁰ Bq g^-1
15262043545.981 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Year of discovery:1977

Radioactive Decay

Half-life T_½ = 6.6(2) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
α	¹⁰⁹Sb	rarely	2.707(10) MeV
EE/β⁺	¹⁰⁹Sn	~100 %	7.228(29) MeV

Parent Nuclides

Direct parent isotope is: ¹¹⁴Cs.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 60) and isobaric (same nucleon number A = 113) with Iodine-113. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 60	Isobar A = 113
34	⁹⁴Se
35	⁹⁵Br
36	⁹⁶Kr
37	⁹⁷Rb
38	⁹⁸Sr
39	⁹⁹Y
40	¹⁰⁰Zr
41	¹⁰¹Nb	¹¹³Nb
42	¹⁰²Mo	¹¹³Mo
43	¹⁰³Tc	¹¹³Tc
44	¹⁰⁴Ru	¹¹³Ru
45	¹⁰⁵Rh	¹¹³Rh
46	¹⁰⁶Pd	¹¹³Pd
47	¹⁰⁷Ag	¹¹³Ag
48	¹⁰⁸Cd	¹¹³Cd
49	¹⁰⁹In	¹¹³In
50	¹¹⁰Sn	¹¹³Sn
51	¹¹¹Sb	¹¹³Sb
52	¹¹²Te	¹¹³Te
53	¹¹³I	¹¹³I
54	¹¹⁴Xe	¹¹³Xe
55	¹¹⁵Cs	¹¹³Cs
56	¹¹⁶Ba
57	¹¹⁷La