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Radionuclide Dosimetric Data Sheets
Palladium-109m
Summary data
General
Classification
Isotope: Pd-109m
Atomic number (Z): 46
Mass number (A): 109
Neutron number (N): 63
Radioactive decay
Decay modes: Internal transition
Half-life: 4.69 [m]
Decay constant: 2.4632e-03 [1/s]
Daughters: Pd-109 (100.0%)
Radioactive daughters: Pd-109
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 0.0777 [MeV]
Mean photon energy: 0.11119 [MeV]
Air kerma rate constant, Γ10: 6.640e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 6.640e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.245e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 0.000e+00
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.245e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.781e-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/Pd-109m 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/Pd-109m 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/Pd-109m Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.86037e-06 |
3.416e+00 |
X-ray |
|
2.82809e-03 |
1.102e-02 |
X-ray |
|
2.09884e-02 |
7.557e-02 |
X-ray |
|
2.11504e-02 |
1.427e-01 |
X-ray |
|
2.37657e-02 |
1.230e-02 |
X-ray |
|
2.37942e-02 |
2.390e-02 |
X-ray |
|
1.88900e-01 |
5.583e-01 |
Gamma |
|
3.82296e-05 |
1.285e+00 |
Auger electron |
|
1.21832e-04 |
6.598e-02 |
Auger electron |
|
1.26784e-04 |
3.402e-01 |
Auger electron |
|
2.92805e-04 |
8.345e-01 |
Auger electron |
|
2.38436e-03 |
3.217e-01 |
Auger electron |
|
2.75877e-03 |
6.526e-02 |
Auger electron |
|
1.76856e-02 |
3.986e-02 |
Auger electron |
|
2.05196e-02 |
1.582e-02 |
Auger electron |
|
1.64579e-01 |
3.192e-01 |
Conversion electron |
|
1.85320e-01 |
3.060e-02 |
Conversion electron |
|
1.85567e-01 |
3.626e-02 |
Conversion electron |
|
1.85729e-01 |
3.261e-02 |
Conversion electron |
|
1.88373e-01 |
1.969e-02 |
Conversion electron |
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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