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Radionuclide Dosimetric Data Sheets

Bromine-76

Isotope:  Br-76
Atomic number (Z):  35
Mass number (A):  76
Neutron number (N):  41

Decay modes:  β+, Electron capture
Half-life:  16.2 [h]
Decay constant:  1.1885e-05 [1/s]
Daughters:  Se-76 (100.0%)
Radioactive daughters:  None

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.64971 [MeV]
Mean photon energy:  2.79329 [MeV]
Air kerma rate constant, Γ₁₀:  8.177e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  1.031e-16 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  1.041e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  1.041e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  4.475e-13 [Gy·kg/Bq·s]

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-76 DPK.csv

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-76 Summary Spectrum.csv

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-76 Beta Spectrum.csv

 

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-76 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.58643e-05	3.411e+00	X-ray
1.11378e-02	6.928e-02	X-ray
1.11804e-02	1.340e-01	X-ray
1.24553e-02	1.826e-02	X-ray
4.72890e-01	1.857e-02	Gamma
5.11000e-01	1.101e+00	Annihilation photon
5.59090e-01	7.400e-01	Gamma
5.63200e-01	3.552e-02	Gamma
6.57020e-01	1.591e-01	Gamma
1.12985e+00	4.588e-02	Gamma
1.21310e+00	1.702e-02	Gamma
1.21610e+00	8.806e-02	Gamma
1.22865e+00	2.087e-02	Gamma
1.38053e+00	2.516e-02	Gamma
1.47113e+00	2.309e-02	Gamma
1.85367e+00	1.465e-01	Gamma
2.09673e+00	1.362e-02	Gamma
2.11123e+00	2.486e-02	Gamma
2.39125e+00	4.736e-02	Gamma
2.51079e+00	1.946e-02	Gamma
2.79269e+00	5.624e-02	Gamma
2.95053e+00	7.400e-02	Gamma
3.60398e+00	1.554e-02	Gamma
3.38591e-01	1.480e-02	Positron
3.77811e-01	6.315e-02	Positron
4.29903e-01	5.131e-02	Positron
5.54227e-01	1.283e-02	Positron
1.22369e+00	2.664e-02	Positron
1.26787e+00	2.072e-02	Positron
1.53501e+00	2.546e-01	Positron
1.80254e+00	5.921e-02	Positron
3.25137e-05	1.575e+00	Auger electron
5.45946e-05	5.826e-01	Auger electron
9.46732e-05	1.024e-01	Auger electron
1.23737e-03	5.020e-01	Auger electron
1.31566e-03	2.362e-02	Auger electron
9.62662e-03	1.247e-01	Auger electron
1.09573e-02	3.677e-02	Auger electron

 

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

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

 

 

 

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