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Radionuclide Dosimetric Data Sheets
Bromine-84
Summary data
General
Classification
Isotope: Br-84
Atomic number (Z): 35
Mass number (A): 84
Neutron number (N): 49
Radioactive decay
Decay modes: β-
Half-life: 31.8 [m]
Decay constant: 3.6328e-04 [1/s]
Daughters: Kr-84 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.23641 [MeV]
Mean photon energy: 1.75946 [MeV]
Air kerma rate constant, Γ10: 5.346e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 5.346e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.981e-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-:
1.981e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 2.819e-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-84 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-84 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-84 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-84 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
6.04800e-01 |
1.747e-02 |
Gamma |
|
7.36500e-01 |
1.290e-02 |
Gamma |
|
8.02200e-01 |
5.990e-02 |
Gamma |
|
8.81600e-01 |
4.160e-01 |
Gamma |
|
1.01590e+00 |
6.157e-02 |
Gamma |
|
1.21330e+00 |
2.579e-02 |
Gamma |
|
1.46380e+00 |
1.955e-02 |
Gamma |
|
1.74120e+00 |
1.622e-02 |
Gamma |
|
1.87750e+00 |
1.123e-02 |
Gamma |
|
1.89760e+00 |
1.456e-01 |
Gamma |
|
2.02960e+00 |
2.080e-02 |
Gamma |
|
2.20070e+00 |
1.165e-02 |
Gamma |
|
2.48410e+00 |
6.656e-02 |
Gamma |
|
2.82410e+00 |
1.123e-02 |
Gamma |
|
3.04540e+00 |
2.496e-02 |
Gamma |
|
3.23530e+00 |
2.038e-02 |
Gamma |
|
3.36580e+00 |
2.870e-02 |
Gamma |
|
3.92750e+00 |
6.781e-02 |
Gamma |
|
1.72221e-01 |
2.088e-02 |
Beta |
|
2.45406e-01 |
1.143e-01 |
Beta |
|
3.35754e-01 |
2.486e-02 |
Beta |
|
4.81541e-01 |
9.346e-02 |
Beta |
|
6.07727e-01 |
3.878e-02 |
Beta |
|
7.54468e-01 |
1.104e-02 |
Beta |
|
7.81681e-01 |
7.158e-02 |
Beta |
|
8.17168e-01 |
1.690e-02 |
Beta |
|
1.15679e+00 |
1.183e-01 |
Beta |
|
1.64122e+00 |
1.342e-01 |
Beta |
|
2.06286e+00 |
3.281e-01 |
Beta |
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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