Iodine-119

Properties and data of the isotope ¹¹⁹I.

Content

General data

Name of the isotope:Iodine-119; I-119Other names:Jod-119Symbol:¹¹⁹I or 11953IMass number A:119 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:66Isotopic mass:118.91007(3) u (atomic weight of Iodine-119)Nuclide mass:118.8809971 u (calculated nuclear mass without electrons)Mass excess:-83.76926 MeVMass defect:1.076541152 u (per nucleus)Nuclear binding energy:1002.79162384 MeV (per nucleus)
8.42682037 MeV (average binding energy per nucleon)Separation energy:S_N = 10.87(3) MeV (first neutron)
S_P = 3.36(3) MeV (first proton)Half-life:19.1(4) minDecay constant λ:0.0006048404716928 s^-1Specific activity α:3.086808913834 × 10⁺¹⁸ Bq g^-1
83427267.94147 Ci g^-1Spin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μ_N) = + 2.9(1)Nuclear g-factor:g_l = 1.16Year of discovery:1954

Radioactive Decay

Half-life T_½ = 19.1(4) min (minutes) respectively 1.146 × 10³ seconds s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
β⁺	¹¹⁹Te	51(4) %	3.416(29) MeV
EE	¹¹⁹Te	49(4) %

Parent Nuclides

Direct parent isotope is: ¹¹⁹Xe.

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 66) and isobaric (same nucleon number A = 119) with Iodine-119. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 66	Isobar A = 119
37	¹⁰³Rb
38	¹⁰⁴Sr
39	¹⁰⁵Y
40	¹⁰⁶Zr
41	¹⁰⁷Nb
42	¹⁰⁸Mo
43	¹⁰⁹Tc	¹¹⁹Tc
44	¹¹⁰Ru	¹¹⁹Ru
45	¹¹¹Rh	¹¹⁹Rh
46	¹¹²Pd	¹¹⁹Pd
47	¹¹³Ag	¹¹⁹Ag
48	¹¹⁴Cd	¹¹⁹Cd
49	¹¹⁵In	¹¹⁹In
50	¹¹⁶Sn	¹¹⁹Sn
51	¹¹⁷Sb	¹¹⁹Sb
52	¹¹⁸Te	¹¹⁹Te
53	¹¹⁹I	¹¹⁹I
54	¹²⁰Xe	¹¹⁹Xe
55	¹²¹Cs	¹¹⁹Cs
56	¹²²Ba	¹¹⁹Ba
57	¹²³La	¹¹⁹La
58	¹²⁴Ce	¹¹⁹Ce
59	¹²⁵Pr
60	¹²⁶Nd
61	¹²⁷Pm
62	¹²⁸Sm