Iodine-114m

Properties and data of the isotope ¹¹⁴I.

Content

General data

Name of the isotope:Iodine-114m; I-114mOther names:Jod-114mSymbol:¹¹⁴I or 11453IMass number A:114 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:61Isotopic mass:113.92185(16) u (atomic weight of Iodine-114m)
Excitation energy: 265.9 keVNuclide mass:113.8927771 u (calculated nuclear mass without electrons)Mass excess:-72.79626 MeVMass defect:1.021436572 u (per nucleus)Nuclear binding energy:951.4620382 MeV (per nucleus)
8.34615823 MeV (average binding energy per nucleon)Half-life:6.2(5) sDecay constant λ:0.11179793234838 s^-1Specific activity α:5.958078729660 × 10⁺²⁰ Bq g^-1
16102915485.568 Ci g^-1Spin and parity:
(nuclear angular momentum)(7)

Radioactive Decay

Half-life T_½ = 6.2(5) s.

Decay mode	Daughter	Probability	Decay energy	γ energy (intensity)
EE/β⁺	¹¹⁴Te	91(2) %
Iso	¹¹⁴I	9(2) %

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
¹¹⁴I		2.1(2) s	1+

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 61) and isobaric (same nucleon number A = 114) with Iodine-114m. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

OZ	Isotone N = 61	Isobar A = 114
34	⁹⁵Se
35	⁹⁶Br
36	⁹⁷Kr
37	⁹⁸Rb
38	⁹⁹Sr
39	¹⁰⁰Y
40	¹⁰¹Zr
41	¹⁰²Nb	¹¹⁴Nb
42	¹⁰³Mo	¹¹⁴Mo
43	¹⁰⁴Tc	¹¹⁴Tc
44	¹⁰⁵Ru	¹¹⁴Ru
45	¹⁰⁶Rh	¹¹⁴Rh
46	¹⁰⁷Pd	¹¹⁴Pd
47	¹⁰⁸Ag	¹¹⁴Ag
48	¹⁰⁹Cd	¹¹⁴Cd
49	¹¹⁰In	¹¹⁴In
50	¹¹¹Sn	¹¹⁴Sn
51	¹¹²Sb	¹¹⁴Sb
52	¹¹³Te	¹¹⁴Te
53	¹¹⁴I	¹¹⁴I
54	¹¹⁵Xe	¹¹⁴Xe
55	¹¹⁶Cs	¹¹⁴Cs
56	¹¹⁷Ba	¹¹⁴Ba
57	¹¹⁸La
58	¹¹⁹Ce