सभी tools

Nuclide reference

Co-58m — Cobalt-58m

Co-58m की half-life 9.1 h है। मुख्य decay mode: isomeric transition → Co-58 (100%)।

Identification

तत्व
Cobalt (Co)
Atomic number Z
27
Mass number A
58
State
Radioactive

Key quantities

Half-life
9.1 h
विशिष्ट गतिविधि
2.197e+17 Bq/g
Gamma constant Γ
—
परिवहन के लिए A1 / A2 (SSR-6)
40 TBq / 40 TBq
D-value (НП-067-24)
0.07 TBq

Decay modes

  • isomeric transition → Co-58 — 100 %

Main gamma lines

Energy, keVYield, %
6.93 · X-ray line16.17
6.914 · X-ray line8.232
24.8890.03967

Lines of the bare nuclide (ENDF/B-VIII.0), without daughter ingrowth.

Related calculators

Decayगतिविधि ↔ द्रव्यमानSource categoryDose rateA1/A2 और package type

इसी element के अन्य isotopes

Co-57Co-60
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.

Cobalt-58m (Co-58m) — reference data

What is in the card

This card gathers the key data of radionuclide Co-58m in one place: half-life, decay modes, main gamma lines, alpha and beta particle energies, gamma constant, specific activity and the D-value for source categorization. Decay and emission data are from ENDF/B-VIII.0; the D-value follows NP-067-24; the gamma constant is the ambient dose equivalent H*(10) at 1 m, computed from ICRP-107 spectra.

How to use the data

Half-life and specific activity let you recalculate the activity of a Co-58m source to the delivery or disposal date — use the decay calculator. Gamma lines with yields identify the nuclide from a spectrum and pick the line for gamma spectrometry; the gamma constant Γ gives the dose rate at a distance, while the D-value and A1/A2 set the source category and the package type for transport.