Rhodium-126
Properties and data of the isotope 126Rh.
See also: List of individual Rhodium isotopes (and general data sources).
General data
Name of the isotope:Rhodium-126; Rh-126Symbol:126Rh or 12645RhMass number A:126 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:81Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.8 (= neutron-proton ratio)Neutron excess (N-Z):36Isotopic mass:125.95996(54) u (atomic weight of Rhodium-126)Nuclide mass:125.9352752 u (calculated nuclear mass without electrons)Mass excess:-37.29702 MeVMass defect:1.094024636 u (per nucleus)Nuclear binding energy:1019.07738429 MeV (per nucleus)
8.08791575 MeV (average binding energy per nucleon)Separation energy:SN = 3.37(71) MeV (first neutron)Half-life:19(3) msDecay constant λ:36.481430555787 s-1Specific activity α:1.757570508631 × 10+23 Bq g-1
4750190563869.2 Ci g-1Spin and parity:
(nuclear angular momentum)Year of discovery:2010
Radioactive Decay
Half-life T½ = 19(3) ms respectively 1.9 × 10-2 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 126Pd | 100 % | 14.56(64) MeV | |
| β-, n | 125Pd | ? | 8.75(64) MeV | |
| β-, 2n | 124Pd | ? | | |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 81) and isobaric (same nucleon number A = 126) with Rhodium-126. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 81 | Isobar A = 126 |
|---|
| 45 | 126Rh | 126Rh |
| 46 | 127Pd | 126Pd |
| 47 | 128Ag | 126Ag |
| 48 | 129Cd | 126Cd |
| 49 | 130In | 126In |
| 50 | 131Sn | 126Sn |
| 51 | 132Sb | 126Sb |
| 52 | 133Te | 126Te |
| 53 | 134I | 126I |
| 54 | 135Xe | 126Xe |
| 55 | 136Cs | 126Cs |
| 56 | 137Ba | 126Ba |
| 57 | 138La | 126La |
| 58 | 139Ce | 126Ce |
| 59 | 140Pr | 126Pr |
| 60 | 141Nd | 126Nd |
| 61 | 142Pm | 126Pm |
| 62 | 143Sm | |
| 63 | 144Eu | |
| 64 | 145Gd | |
| 65 | 146Tb | |
| 66 | 147Dy | |
| 67 | 148Ho | |
| 68 | 149Er | |
| 69 | 150Tm | |
| 70 | 151Yb | |
| 71 | 152Lu | |
| 72 | 153Hf | |
External data and identifiers
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/rhodium-126
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