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Radionuclide Dosimetric Data Sheets
Californium-248
Summary data
General
Classification
Isotope: Cf-248
Atomic number (Z): 98
Mass number (A): 248
Neutron number (N): 150
Radioactive decay
Decay modes: α, Spontaneus fission
Half-life: 334.0 [d]
Decay constant: 2.4020e-08 [1/s]
Daughters: Cm-244 (100.0%), SF (0.0029%)
Radioactive daughters: Cm-244
Dosimetric constants
Mean alpha energy: 6.3518 [MeV]
Mean electron energy: 0.00745 [MeV]
Mean photon energy: 0.00202 [MeV]
Air kerma rate constant, Γ10: 1.566e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.627e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.019e-12 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα: 1.018e-12
[Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:
1.194e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 3.236e-16
[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/Cf-248 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/Cf-248 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/Cf-248 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/Cf-248 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
7.76503e-05 |
1.967e+00 |
X-ray |
|
3.66085e-03 |
1.389e-02 |
X-ray |
|
1.49784e-02 |
2.750e-02 |
X-ray |
|
1.95388e-02 |
3.049e-02 |
X-ray |
|
9.71088e-05 |
5.565e-01 |
Auger electron |
|
1.90619e-04 |
2.979e-01 |
Auger electron |
|
2.79661e-04 |
5.161e-01 |
Auger electron |
|
6.01070e-04 |
8.531e-02 |
Auger electron |
|
1.79581e-03 |
1.787e-02 |
Auger electron |
|
2.67809e-03 |
1.669e-01 |
Auger electron |
|
3.27247e-03 |
3.697e-02 |
Auger electron |
|
1.12875e-02 |
4.071e-02 |
Auger electron |
|
1.50609e-02 |
2.154e-02 |
Auger electron |
|
1.91890e-02 |
7.654e-02 |
Conversion electron |
|
2.39710e-02 |
6.510e-02 |
Conversion electron |
|
3.81360e-02 |
4.025e-02 |
Conversion electron |
|
4.29650e-02 |
1.501e-02 |
Conversion electron |
|
6.21607e+00 |
1.960e-01 |
Alpha |
|
6.25834e+00 |
8.000e-01 |
Alpha |
|
1.01969e-01 |
1.960e-01 |
Alpha recoil |
|
1.02662e-01 |
8.000e-01 |
Alpha recoil |
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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