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Radionuclide Dosimetric Data Sheets
Radium-219
Summary data
General
Classification
Isotope: Ra-219
Atomic number (Z): 88
Mass number (A): 219
Neutron number (N): 131
Radioactive decay
Decay modes: α
Half-life: 10.0 [ms]
Decay constant: 6.9315e+01 [1/s]
Daughters: Rn-215 (100.0%)
Radioactive daughters: Rn-215
Dosimetric constants
Mean alpha energy: 7.9011 [MeV]
Mean electron energy: 0.05997 [MeV]
Mean photon energy: 0.17015 [MeV]
Air kerma rate constant, Γ10: 9.155e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 9.155e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.276e-12 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 1.266e-12
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
9.608e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.726e-14
[Gy·kg/Bq·s]
Dose point kernels (plot)
Dose point kernel source: Graves, et al. Medical Physics. 2019 Nov.; 46(11):5284-5293.
Note: Bins are spaced every 0.1 mm until a radius of 10 cm, and every 1 mm until a radius of 2 m.
Download tabulated dose point kernel file here: www.mirdsoft.org/products/MIRDspecs/Ra-219 DPK.csv
Summary spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated summary spectra file here: www.mirdsoft.org/products/MIRDspecs/Ra-219 Summary Spectrum.csv
Tabulated data
Summary spectra (table)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Note: Radiations with yield < 0.01 are excluded from the table, but are available in the linked *.csv data.
Download tabulated summary spectra file here: www.mirdsoft.org/products/MIRDspecs/Ra-219 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.00916e-05 |
2.877e+00 |
X-ray |
|
2.70882e-03 |
1.351e-02 |
X-ray |
|
1.17297e-02 |
3.549e-02 |
X-ray |
|
1.43744e-02 |
2.337e-02 |
X-ray |
|
8.13680e-02 |
5.717e-02 |
X-ray |
|
8.41450e-02 |
9.425e-02 |
X-ray |
|
9.46165e-02 |
1.066e-02 |
X-ray |
|
9.52461e-02 |
2.071e-02 |
X-ray |
|
3.15820e-01 |
4.260e-01 |
Gamma |
|
5.92000e-01 |
1.088e-02 |
Gamma |
|
3.67840e-05 |
7.408e-01 |
Auger electron |
|
1.12898e-04 |
8.487e-01 |
Auger electron |
|
1.79784e-04 |
4.662e-01 |
Auger electron |
|
4.49856e-04 |
1.117e-01 |
Auger electron |
|
1.27009e-03 |
3.452e-02 |
Auger electron |
|
2.11797e-03 |
2.591e-01 |
Auger electron |
|
2.44728e-03 |
3.869e-02 |
Auger electron |
|
8.86419e-03 |
7.387e-02 |
Auger electron |
|
1.15963e-02 |
3.476e-02 |
Auger electron |
|
2.17056e-01 |
1.912e-01 |
Conversion electron |
|
2.97778e-01 |
3.074e-02 |
Conversion electron |
|
7.19829e+00 |
2.388e-02 |
Alpha |
|
7.67922e+00 |
6.587e-01 |
Alpha |
|
7.98927e+00 |
3.035e-01 |
Alpha |
|
1.34009e-01 |
2.388e-02 |
Alpha recoil |
|
1.42962e-01 |
6.587e-01 |
Alpha recoil |
|
1.48734e-01 |
3.035e-01 |
Alpha recoil |
Useful Links
Isotope decay characteristics are periodically updated as better measurements can be made - changes that may not be reflected on this page. Please see useful links:
National Nuclear Data Center (NNDC): https://www.nndc.bnl.gov/nudat3/mird/
International Atomic Energy Agency (IAEA) Livechart: https://www-nds.iaea.org/relnsd/vcharthtml/VChartHTML.html
Reference Links
ICRP Report 107: https://www.icrp.org/publication.asp?id=ICRP%20Publication%20107
Graves et al. Dose Point Kernels: https://doi.org/10.1002/mp.13789
MIRD Decay Schemes 2nd Edition: https://sites.snmmi.org/SNMMI-MAIN/iCore/Store/StoreLayouts/Item_Detail.aspx?iProductCode=0-932004-80-6
MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)
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