Nuclide reference
Rh-102m — Rhodium-102m
The half-life of Rh-102m is 3.742 years. Main decay mode: β⁺ decay / electron capture to Ru-102 (99.77%).
Identification
- Element
- Rhodium (Rh)
- Atomic number Z
- 45
- Mass number A
- 102
- State
- Radioactive
Key quantities
- Half-life
- 3.742 years
- Specific activity
- 3.466e+13 Bq/g
- Gamma constant Γ
- —
- A1 / A2 for transport (SSR-6, НП-053-16)
- 2 TBq / 2 TBq
- D-value (НП-067-24)
- 0.1 TBq
Decay modes
- β⁺ decay / electron capture → Ru-102 — 99.77 %
- isomeric transition → Rh-102 — 0.233 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 475.06 | 94.78 |
| 631.29 | 55.87 |
| 697.49 | 43.9 |
| 19.28 · X-ray line | 38.18 |
| 766.84 | 33.92 |
| 1,046.59 | 33.92 |
| 19.151 · X-ray line | 20.12 |
| 1,112.84 | 18.96 |
| 418.52 | 9.378 |
| 628.05 | 8.281 |
Lines of the nuclide itself (ENDF/B-VIII.0).
Alpha and beta particles
| Radiation | Energy, keV | Yield, % |
|---|---|---|
| β⁻, E max | 1,150 (Rh-102) | 0.05499 |
| β⁺, E max | 1,301 (Rh-102) | 0.03016 |
| 825.93 (Rh-102) | 0.01089 |
For β⁻ and β⁺ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0. Includes daughter nuclides in equilibrium: Rh-102 (yield per decay of Rh-102m); the emitting nuclide is in brackets. Equilibrium is reached in about 4.7 years.
Related calculators
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.K-series X-ray energies are from NIST SRD 128 (Deslattes et al., 2003): in ENDF/B-VIII.0 they are given to 1 % and shifted by up to 0.7 keV for heavy elements. L-series lines and all yields are ENDF/B-VIII.0.