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Nuclide reference

Hg-195 — Mercury-195

Hg-195 की half-life 10.53 h है। मुख्य decay mode: β⁺ decay / electron capture → Au-195 (97.81%)।

Identification

तत्व
Mercury (Hg)
Atomic number Z
80
Mass number A
195
State
Radioactive

Key quantities

Half-life
10.53 h
विशिष्ट गतिविधि
5.647e+16 Bq/g
Gamma constant Γ
—
D-value (НП-067-24)
—

Decay modes

  • β⁺ decay / electron capture → Au-195 — 97.81 %
  • β⁺ decay / electron capture → Au-195m — 2.193 %

Main gamma lines

Energy, keVYield, %
68.807 · X-ray line38.83
66.993 · X-ray line22.72
779.87
61.466.37
585.132.044
180.111.953
599.661.834
207.11.617
261.75 (Au-195m)1.508
1,111.041.484

Includes daughter nuclides in equilibrium: Au-195m (yield per decay of Hg-195); the emitting nuclide is in brackets. Equilibrium is reached in about 3.6 min.

Alpha and beta particles

RadiationEnergy, keVYield, %
β⁺, E max486.570.053
5480.012

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

Related calculators

Decayगतिविधि ↔ द्रव्यमानDose rate
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.

Mercury-195 (Hg-195) — reference data

What is in the card

This card gathers the key data of radionuclide Hg-195 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 Hg-195 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.