Indium-124
Properties and data of the isotope 124In.
See also: List of individual Indium isotopes (and general data sources).
General data
Name of the isotope:Indium-124; In-124Symbol:124In or 12449InMass number A:124 (= number of nucleons)Atomic number Z:49 (= number of protons)Neutrons N:75Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.530612244898 (= neutron-proton ratio)Neutron excess (N-Z):26Isotopic mass:123.91318(3) u (atomic weight of Indium-124)Nuclide mass:123.8863011 u (calculated nuclear mass without electrons)Mass excess:-80.87231 MeVMass defect:1.120115268 u (per nucleus)Nuclear binding energy:1043.38065145 MeV (per nucleus)
8.41436009 MeV (average binding energy per nucleon)Separation energy:SN = 5.51(4) MeV (first neutron)
SP = 10.74(3) MeV (first proton)Half-life:3.12(9) sDecay constant λ:0.22216255787178 s-1Specific activity α:1.087718875859 × 10+21 Bq g-1
29397807455.673 Ci g-1Spin and parity:
(nuclear angular momentum)(1)+Magnetic dipole moment:μ(μN) = + 4.043(11)Quadrupole moment Q:+ 0.614(68) barn (100 fm2)Nuclear g-factor:gl = 4.043Charge radius:4.6625(60) femtometer fmYear of discovery:1964
Radioactive Decay
Half-life T½ = 3.12(9) s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 124Sn | 100 % | 7.36(3) MeV | |
Parent Nuclides
Direct parent isotope is: 124Cd.
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 |
|---|
| 124mIn | 36.53(4) keV | 3.7(2) s | (8-) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 75) and isobaric (same nucleon number A = 124) with Indium-124. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 75 | Isobar A = 124 |
|---|
| 42 | 117Mo | |
| 43 | 118Tc | |
| 44 | 119Ru | 124Ru |
| 45 | 120Rh | 124Rh |
| 46 | 121Pd | 124Pd |
| 47 | 122Ag | 124Ag |
| 48 | 123Cd | 124Cd |
| 49 | 124In | 124In |
| 50 | 125Sn | 124Sn |
| 51 | 126Sb | 124Sb |
| 52 | 127Te | 124Te |
| 53 | 128I | 124I |
| 54 | 129Xe | 124Xe |
| 55 | 130Cs | 124Cs |
| 56 | 131Ba | 124Ba |
| 57 | 132La | 124La |
| 58 | 133Ce | 124Ce |
| 59 | 134Pr | 124Pr |
| 60 | 135Nd | 124Nd |
| 61 | 136Pm | |
| 62 | 137Sm | |
| 63 | 138Eu | |
| 64 | 139Gd | |
| 65 | 140Tb | |
| 66 | 141Dy | |
| 67 | 142Ho | |
| 68 | 143Er | |
| 69 | 144Tm | |
External data and identifiers
Last update: 2020-10-17
Perma link: https://www.chemlin.org/isotope/indium-124
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