Nuclide reference
Ba-137m — Barium-137m
Ba-137m की half-life 2.552 min है। मुख्य decay mode: isomeric transition → Ba-137 (100%)।
Identification
- तत्व
- Barium (Ba)
- Atomic number Z
- 56
- Mass number A
- 137
- State
- Radioactive
Key quantities
- Half-life
- 2.552 min
- विशिष्ट गतिविधि
- 1.99e+19 Bq/g
- Gamma constant Γ
- —
- D-value (НП-067-24)
- —
Decay modes
- isomeric transition → Ba-137 — 100 %
Main gamma lines
| Energy, keV | Yield, % |
|---|---|
| 661.657 | 89.9 |
| 32.193 · X-ray line | 3.839 |
| 31.817 · X-ray line | 2.104 |
Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.
Related calculators
इसी element के अन्य isotopes
Reference data vs computed valuesHalf-life, gamma lines and D-value are reference data (ENDF/B-VIII.0, НП-067-24).Gamma constant Γ 1 m पर H*(10) है, ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) से गणना की गई, equilibrium में short-lived progeny सहित (जैसे Cs-137/Ba-137m, Ra-226 series); specific activity molar mass M ≈ mass number A का उपयोग करती है।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.