All tools

Nuclide reference

Rb-82 — Rubidium-82

The half-life of Rb-82 is 1.2575 min. Main decay mode: β⁺ decay / electron capture to Kr-82 (100%).

Identification

Element
Rubidium (Rb)
Atomic number Z
37
Mass number A
82
State
Radioactive

Key quantities

Half-life
1.2575 min
Specific activity
6.747e+19 Bq/g
Gamma constant Γ
—
D-value (НП-067-24)
—

Decay modes

  • β⁺ decay / electron capture → Kr-82 — 100 %

Main gamma lines

Energy, keVYield, %
510.999 · annihilation 511 keV190.9
776.5215.08
12.648 · X-ray line1.469
12.596 · X-ray line0.762
1,395.140.5293
698.370.1493
1,474.880.08897
696.860.07691
711.20.0573
1,703.190.05052

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

Alpha and beta particles

RadiationEnergy, keVYield, %
β⁺, E max3,38081.76
2,603.513.13
1,208.30.32
1,905.10.121

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

Related calculators

DecayActivity ↔ massDose 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 is H*(10) at 1 m computed from ICRP-107 spectra (NIST µ_en/ρ, ICRP-74 Table A.21) including short-lived progeny in equilibrium (e.g. Cs-137/Ba-137m, Ra-226 series); specific activity uses molar mass M ≈ mass number A.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.

Rubidium-82 (Rb-82) — reference data

What is in the card

This card gathers the key data of radionuclide Rb-82 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 Rb-82 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.