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Radionuclide Dosimetric Data Sheets
Arsenic-76
Summary data
General
Classification
Isotope: As-76
Atomic number (Z): 33
Mass number (A): 76
Neutron number (N): 43
Radioactive decay
Decay modes: β-
Half-life: 1.078 [d]
Decay constant: 7.4434e-06 [1/s]
Daughters: Se-76 (100.0%)
Radioactive daughters: None
Dosimetric constants
Mean alpha energy: 0.0 [MeV]
Mean electron energy: 1.06699 [MeV]
Mean photon energy: 0.41658 [MeV]
Air kerma rate constant, Γ10: 1.525e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair: 1.525e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or
electrons), Δwp: 1.710e-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-:
1.710e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp: 6.674e-14
[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/As-76 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/As-76 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/As-76 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/As-76 Summary Spectrum.csv
|
Energy [MeV] |
Yield [#/nt] if > 0.01 |
Radiation type |
|
5.59100e-01 |
4.500e-01 |
Gamma |
|
5.63230e-01 |
1.201e-02 |
Gamma |
|
6.57050e-01 |
6.165e-02 |
Gamma |
|
1.21292e+00 |
1.440e-02 |
Gamma |
|
1.21608e+00 |
3.420e-02 |
Gamma |
|
1.22852e+00 |
1.215e-02 |
Gamma |
|
9.04467e-02 |
1.032e-02 |
Beta |
|
1.71079e-01 |
1.693e-02 |
Beta |
|
4.33361e-01 |
1.773e-02 |
Beta |
|
6.88418e-01 |
7.512e-02 |
Beta |
|
9.92929e-01 |
3.526e-01 |
Beta |
|
1.26366e+00 |
5.108e-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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