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Radionuclide Dosimetric Data Sheets
Bromine-72
Summary data
General
Classification
Isotope: Br-72
Atomic number (Z): 35
Mass number (A): 72
Neutron number (N): 37
Radioactive decay
Decay modes: β+, Electron capture
Half-life: 78.6 [s]
Decay constant: 8.8187e-03 [1/s]
Daughters: Se-72 (100.0%)
Radioactive daughters: Se-72
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 2.788 [MeV]
Mean photon energy: 2.96243 [MeV]
Air kerma rate constant, Γ10: 6.916e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.076e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 4.467e-13 [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-:
4.467e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 4.746e-13
[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/Br-72 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/Br-72 Summary Spectrum.csv
Beta spectra (plot)
Spectra source: ICRP Publication 107: Nuclear Decay Data for Dosimetric Calculations. Ann. ICRP 2008, 38 (3).
Download tabulated beta spectra file here: www.mirdsoft.org/products/MIRDspecs/Br-72 Beta 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/Br-72 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.58639e-05 |
7.799e-01 |
X-ray |
|
1.11378e-02 |
1.568e-02 |
X-ray |
|
1.11804e-02 |
3.033e-02 |
X-ray |
|
7.50000e-02 |
2.621e-02 |
Gamma |
|
3.79900e-01 |
3.580e-02 |
Gamma |
|
3.79900e-01 |
3.580e-02 |
Gamma |
|
4.54700e-01 |
1.313e-01 |
Gamma |
|
5.11000e-01 |
1.988e+00 |
Annihilation photon |
|
5.12000e-01 |
2.036e-02 |
Gamma |
|
5.37600e-01 |
1.264e-02 |
Gamma |
|
5.59300e-01 |
2.597e-02 |
Gamma |
|
7.10200e-01 |
1.615e-02 |
Gamma |
|
7.52800e-01 |
2.948e-02 |
Gamma |
|
7.74800e-01 |
7.090e-02 |
Gamma |
|
8.32000e-01 |
2.036e-02 |
Gamma |
|
8.62000e-01 |
7.020e-01 |
Gamma |
|
1.05470e+00 |
3.721e-02 |
Gamma |
|
1.06160e+00 |
5.546e-02 |
Gamma |
|
1.08920e+00 |
3.159e-02 |
Gamma |
|
1.08920e+00 |
3.159e-02 |
Gamma |
|
1.12510e+00 |
5.335e-02 |
Gamma |
|
1.13640e+00 |
7.020e-02 |
Gamma |
|
1.22730e+00 |
1.053e-02 |
Gamma |
|
1.31670e+00 |
1.727e-01 |
Gamma |
|
1.34990e+00 |
2.246e-02 |
Gamma |
|
1.50980e+00 |
3.299e-02 |
Gamma |
|
1.57130e+00 |
3.791e-02 |
Gamma |
|
1.64850e+00 |
1.544e-02 |
Gamma |
|
1.72400e+00 |
3.440e-02 |
Gamma |
|
1.80740e+00 |
1.755e-02 |
Gamma |
|
1.90940e+00 |
1.334e-02 |
Gamma |
|
2.37190e+00 |
7.511e-02 |
Gamma |
|
2.43270e+00 |
1.264e-02 |
Gamma |
|
2.12845e+00 |
2.921e-02 |
Positron |
|
2.13503e+00 |
4.270e-02 |
Positron |
|
2.20614e+00 |
1.048e-01 |
Positron |
|
2.26134e+00 |
4.367e-02 |
Positron |
|
2.44545e+00 |
4.270e-02 |
Positron |
|
2.52185e+00 |
4.755e-02 |
Positron |
|
2.55002e+00 |
1.165e-01 |
Positron |
|
2.65786e+00 |
2.814e-02 |
Positron |
|
2.73186e+00 |
5.823e-02 |
Positron |
|
2.91600e+00 |
6.599e-02 |
Positron |
|
3.06549e+00 |
1.873e-01 |
Positron |
|
3.28860e+00 |
2.271e-01 |
Positron |
|
3.25107e-05 |
3.603e-01 |
Auger electron |
|
5.45304e-05 |
1.330e-01 |
Auger electron |
|
9.38560e-05 |
2.187e-02 |
Auger electron |
|
1.23706e-03 |
1.156e-01 |
Auger electron |
|
9.62662e-03 |
2.823e-02 |
Auger electron |
|
6.23810e-02 |
5.363e-02 |
Conversion electron |
|
9.24381e-01 |
2.940e-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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