Nuclide reference

Ge-77 — Germanium-77

Ge-77 की half-life 11.3 h है। मुख्य decay mode: β⁻ decay → As-77 (100%)।

Identification

तत्व
Germanium (Ge)
Atomic number Z
32
Mass number A
77
State
Radioactive

Key quantities

Half-life
11.3 h
विशिष्ट गतिविधि
1.333e+17 Bq/g
Gamma constant Γ
—
परिवहन के लिए A1 / A2 (SSR-6)
0.3 TBq / 0.3 TBq
D-value (НП-067-24)
0.06 TBq

Decay modes

  • β⁻ decay → As-77 — 100 %

Main gamma lines

Energy, keVYield, %
264.4453.9
211.0330.83
215.528.62
416.3321.83
558.0216.06
367.414.01
714.357.169
631.826.953
1,085.196.048
1,368.43.342

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

Alpha and beta particles

RadiationEnergy, keVYield, %
β⁻, E max2,070.720.5
1,512.718.5
2,227.115.3
702.368

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।

Germanium-77 (Ge-77) — reference data

What is in the card

This card gathers the key data of radionuclide Ge-77 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 Ge-77 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.