Rhodium-108
Properties and data of the isotope 108Rh.
See also: List of individual Rhodium isotopes (and general data sources).
General data
Name of the isotope:Rhodium-108; Rh-108Symbol:108Rh or 10845RhMass number A:108 (= number of nucleons)Atomic number Z:45 (= number of protons)Neutrons N:63Nucleon pairing (Z - N):odd - oddNuclear ratio (N/Z ratio):1.4 (= neutron-proton ratio)Neutron excess (N-Z):18Isotopic mass:107.908715(15) u (atomic weight of Rhodium-108)Nuclide mass:107.8840302 u (calculated nuclear mass without electrons)Mass excess:-85.03143 MeVMass defect:0.98930114800001 u (per nucleus)Nuclear binding energy:921.52808356 MeV (per nucleus)
8.53266744 MeV (average binding energy per nucleon)Separation energy:SN = 6.239(18) MeV (first neutron)
SP = 8.458(16) MeV (first proton)Half-life:16.8(5) sDecay constant λ:0.041258760747616 s-1Specific activity α:2.32211279372 × 10+20 Bq g-1
6275980523.5811 Ci g-1Spin and parity:
(nuclear angular momentum)1+Year of discovery:1955
Radioactive Decay
Half-life T½ = 16.8(5) s respectively 1.68 × 101 seconds s.
Decay
mode | Daughter | Probability | Decay energy | γ energy
(intensity) |
|---|
| β- | 108Pd | 100 % | 4.492(14) MeV | |
Parent Nuclides
Direct parent isotope is: 108Ru.
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 |
|---|
| 108mRh | +x keV | 6.0(3) min | (5+) |
Isotones and Isobars
The following table shows the atomic nuclei that are isotonic (same neutron number N = 63) and isobaric (same nucleon number A = 108) with Rhodium-108. Naturally occurring isotopes are marked in green; light green = naturally occurring radionuclides.
| Z | Isotone N = 63 | Isobar A = 108 |
|---|
| 35 | 98Br | |
| 36 | 99Kr | |
| 37 | 100Rb | |
| 38 | 101Sr | |
| 39 | 102Y | 108Y |
| 40 | 103Zr | 108Zr |
| 41 | 104Nb | 108Nb |
| 42 | 105Mo | 108Mo |
| 43 | 106Tc | 108Tc |
| 44 | 107Ru | 108Ru |
| 45 | 108Rh | 108Rh |
| 46 | 109Pd | 108Pd |
| 47 | 110Ag | 108Ag |
| 48 | 111Cd | 108Cd |
| 49 | 112In | 108In |
| 50 | 113Sn | 108Sn |
| 51 | 114Sb | 108Sb |
| 52 | 115Te | 108Te |
| 53 | 116I | 108I |
| 54 | 117Xe | |
| 55 | 118Cs | |
| 56 | 119Ba | |
| 57 | 120La | |
| 58 | 121Ce | |
| 59 | 122Pr | |
External data and identifiers
Last update: 2020-10-15
Perma link: https://www.chemlin.org/isotope/rhodium-108
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