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Radionuclide Dosimetric Data Sheets
Krypton-87
Summary data
General
Classification
Isotope: Kr-87
Atomic number (Z): 36
Mass number (A): 87
Neutron number (N): 51
Radioactive decay
Decay modes: β-
Half-life: 76.3 [m]
Decay constant: 1.5141e-04 [1/s]
Daughters: Rb-87 (100.0%)
Radioactive daughters: Rb-87
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.32812 [MeV]
Mean photon energy: 0.79192 [MeV]
Air kerma rate constant, Γ10: 2.524e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 2.524e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 2.128e-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-:
2.128e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 1.269e-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/Kr-87 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/Kr-87 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/Kr-87 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/Kr-87 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
1.52788e-05 |
1.962e-02 |
X-ray |
|
4.02587e-01 |
4.960e-01 |
Gamma |
|
6.73830e-01 |
1.890e-02 |
Gamma |
|
8.45440e-01 |
7.341e-02 |
Gamma |
|
1.17540e+00 |
1.106e-02 |
Gamma |
|
1.74052e+00 |
2.039e-02 |
Gamma |
|
2.01188e+00 |
2.882e-02 |
Gamma |
|
2.55480e+00 |
9.226e-02 |
Gamma |
|
2.55810e+00 |
3.918e-02 |
Gamma |
|
3.25538e-01 |
4.390e-02 |
Beta |
|
4.99481e-01 |
9.380e-02 |
Beta |
|
5.61648e-01 |
5.488e-02 |
Beta |
|
1.29312e+00 |
7.284e-02 |
Beta |
|
1.50078e+00 |
4.091e-01 |
Beta |
|
1.69355e+00 |
3.043e-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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