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Iodine-127

Properties and data of the isotope 127I.

Contents
General Data
Parent Nuclides
NMR Data
Isotones und Isobares

See also: list of Iodine isotopes.

 

General data

Name of the isotope:Iodine-127; I-127Other names:Jod-127Symbol:127I or 12753IMass number A:127 (= number of nucleons)Atomic number Z:53 (= number of protons)Neutrons N:74Isotopic mass:126.90447(3) u (atomic weight of Iodine-127)Nuclide mass:126.8753971 u (calculated nuclear mass without electrons)Mass excess:-88.98562 MeVMass defect:1.15146048 u (per nucleus)Nuclear binding energy:1072.57852836 MeV (per nucleus)
8.44550022 MeV (average binding energy per nucleon)Separation energy:SN = 9.1439(27) MeV (first neutron)
SP = 6.208(4) MeV (first proton)Half-life:stableSpin and parity:
(nuclear angular momentum)5/2+Magnetic dipole moment:μ(μN) = +2.8087(14)Charge radius:4.7500(81) femtometer fmYear of discovery:1920

 

Parent Nuclides

Direct parent isotopes are: 127Xe, 127Te.

 

Occurrence

Comparison of the natural Iodine isotopes including isotopic abundance (mole fraction of the isotope mixture in percent):

 

Atomic Mass maQuantityHalf-lifeSpin
Iodine
Isotopic mixture		126.90447 u100 %
Isotope 127I126.90447(3) u100 %stable5/2+

 

NMR data

Nuclear magnetic properties of the NMR active Nuclide 127I

Isotope:127I-NMRQuantity:100 %Spin:5/2+Nuclearmagnetic moment
μ/μN:+2.8087(14)Gyromagnetic ratio γ:5.3817 · 107 rad T-1 s-1Nuclear g-factor:gl = 1.12348Quadrupole moment Q:- 0.68822 barn (100 fm2)Resonance frequency:v0 = 8.5778 at 1 TRelative Sensitivity:0.09540 (H0 = const.)
2.3504 (v0 = const.)
[related to 1H = 1.000]

 

Isotones and Isobars

The following table shows the atomic nuclei that are isotonic (same neutron number N = 74) and isobaric (same nucleon number A = 127) with Iodine-127. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.

 

ZIsotone N = 74Isobar A = 127
41115Nb
42116Mo
43117Tc
44118Ru
45119Rh127Rh
46120Pd127Pd
47121Ag127Ag
48122Cd127Cd
49123In127In
50124Sn127Sn
51125Sb127Sb
52126Te127Te
53127I127I
54128Xe127Xe
55129Cs127Cs
56130Ba127Ba
57131La127La
58132Ce127Ce
59133Pr127Pr
60134Nd127Nd
61135Pm127Pm
62136Sm
63137Eu
64138Gd
65139Tb
66140Dy
67141Ho

 

External data and identifiers

Adopted Levels, Gammas:NuDat 127I

 

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Last update: 2020-10-18

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