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Radionuclide Dosimetric Data Sheets

Bromine-76m

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

Decay modes:  β+, Electron capture, Internal transition
Half-life:  1.31 [s]
Decay constant:  5.2912e-01 [1/s]
Daughters:  Br-76 (99.7%), Se-76 (0.3%)
Radioactive daughters:  Br-76

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.06902 [MeV]
Mean photon energy:  0.04328 [MeV]
Air kerma rate constant, Γ₁₀:  3.200e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  3.211e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  1.106e-14 [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-:  1.106e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  6.934e-15 [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-76m 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-76m 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-76m 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-76m Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.75893e-05	1.004e+01	X-ray
1.47515e-03	1.516e-02	X-ray
1.18329e-02	2.193e-01	X-ray
1.18814e-02	4.235e-01	X-ray
1.32432e-02	3.025e-02	X-ray
1.32502e-02	5.903e-02	X-ray
4.54800e-02	4.835e-01	Gamma
5.71100e-02	9.073e-02	Gamma
4.38571e-05	4.518e+00	Auger electron
5.77097e-05	1.745e+00	Auger electron
9.07436e-05	3.112e-01	Auger electron
1.32091e-03	1.500e+00	Auger electron
1.41188e-03	8.906e-02	Auger electron
1.02029e-02	3.509e-01	Auger electron
1.16354e-02	1.073e-01	Auger electron
3.20450e-02	4.576e-01	Conversion electron
4.36750e-02	7.416e-01	Conversion electron
4.37108e-02	4.797e-02	Conversion electron
5.53408e-02	9.493e-02	Conversion electron
5.55564e-02	1.351e-02	Conversion electron
5.69252e-02	1.961e-02	Conversion 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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