Nuclide reference

In-114m — Indium-114m

In-114m की half-life 49.51 d है। मुख्य decay mode: isomeric transition → In-114 (96.75%)।

Identification

तत्व
Indium (In)
Atomic number Z
49
Mass number A
114
State
Radioactive

Key quantities

Half-life
49.51 d
विशिष्ट गतिविधि
8.56e+14 Bq/g
Gamma constant Γ
—
परिवहन के लिए A1 / A2 (SSR-6)
10 TBq / 0.5 TBq
D-value (НП-067-24)
0.8 TBq

Decay modes

  • isomeric transition → In-114 — 96.75 %
  • β⁺ decay / electron capture → Cd-114 — 3.25 %

Main gamma lines

Energy, keVYield, %
24.21 · X-ray line18.55
190.2715.56
24.002 · X-ray line9.487
558.433.242
725.243.242
1,299.83 (In-114)0.1348

Includes daughter nuclides in equilibrium: In-114 (yield per decay of In-114m); the emitting nuclide is in brackets. Equilibrium is reached in about 8.4 min.

Alpha and beta particles

RadiationEnergy, keVYield, %
β⁻, E max1,988.7 (In-114)96.13
688.78 (In-114)0.1354

For β⁻ the endpoint (maximum) energy of the spectrum is given. ENDF/B-VIII.0.

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 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.

Indium-114m (In-114m) — reference data

What is in the card

This card gathers the key data of radionuclide In-114m 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 In-114m 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.