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Radionuclide Dosimetric Data Sheets

Berkelium-247

Isotope:  Bk-247
Atomic number (Z):  97
Mass number (A):  247
Neutron number (N):  150

Decay modes:  α
Half-life:  1380.0 [y]
Decay constant:  1.5917e-11 [1/s]
Daughters:  Am-243 (100.0%)
Radioactive daughters:  Am-243

Mean alpha energy:  5.7025 [MeV]
Mean electron energy:  0.06911 [MeV]
Mean photon energy:  0.14675 [MeV]
Air kerma rate constant, Γ₁₀:  8.693e-18 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  8.693e-18 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  9.247e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  9.136e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  1.107e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  2.351e-14 [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/Bk-247 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/Bk-247 Summary 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/Bk-247 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
7.21564e-05	4.832e+00	X-ray
3.54543e-03	3.288e-02	X-ray
1.46345e-02	7.466e-02	X-ray
1.77003e-02	1.600e-02	X-ray
1.89584e-02	4.472e-02	X-ray
2.21841e-02	1.041e-02	X-ray
8.40000e-02	4.000e-01	Gamma
1.02508e-01	8.314e-02	X-ray
1.07043e-01	1.309e-01	X-ray
1.19828e-01	1.522e-02	X-ray
1.20885e-01	2.989e-02	X-ray
2.65000e-01	3.000e-01	Gamma
9.53021e-05	1.353e+00	Auger electron
1.89939e-04	7.463e-01	Auger electron
2.58774e-04	1.269e+00	Auger electron
5.79180e-04	2.054e-01	Auger electron
1.86914e-03	8.123e-02	Auger electron
2.60905e-03	4.142e-01	Auger electron
3.17033e-03	8.835e-02	Auger electron
1.08115e-02	1.036e-01	Auger electron
1.44575e-02	5.416e-02	Auger electron
6.01730e-02	2.703e-02	Conversion electron
6.09380e-02	2.023e-02	Conversion electron
6.54730e-02	1.796e-02	Conversion electron
7.93145e-02	1.621e-02	Conversion electron
1.39430e-01	2.848e-01	Conversion electron
2.41173e-01	5.041e-02	Conversion electron
2.60315e-01	1.379e-02	Conversion electron
5.45515e+00	1.512e-02	Alpha
5.50040e+00	7.056e-02	Alpha
5.53188e+00	4.536e-01	Alpha
5.65387e+00	5.544e-02	Alpha
5.68732e+00	1.310e-01	Alpha
5.71093e+00	1.714e-01	Alpha
5.75324e+00	4.335e-02	Alpha
5.79357e+00	5.544e-02	Alpha
8.98550e-02	1.512e-02	Alpha recoil
9.06004e-02	7.056e-02	Alpha recoil
9.11190e-02	4.536e-01	Alpha recoil
9.31283e-02	5.544e-02	Alpha recoil
9.36793e-02	1.310e-01	Alpha recoil
9.40682e-02	1.714e-01	Alpha recoil
9.47650e-02	4.335e-02	Alpha recoil
9.54294e-02	5.544e-02	Alpha recoil

 

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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