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Radionuclide Dosimetric Data Sheets

Astatine-210

Summary data

General

Classification

Isotope:  At-210
Atomic number (Z):  85
Mass number (A):  210
Neutron number (N):  125

Radioactive decay

Decay modes:  α, β+, Electron capture
Half-life:  8.1 [h]
Decay constant:  2.3770e-05 [1/s]
Daughters:  Po-210 (99.8%), Bi-206 (0.175%)
Radioactive daughters:  Po-210, Bi-206

Dosimetric constants

Mean alpha energy:  0.0097 [MeV]
Mean electron energy:  0.07962 [MeV]
Mean photon energy:  2.96215 [MeV]
Air kerma rate constant, Γ10:  1.190e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  1.191e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  1.431e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δα:  1.554e-15 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δβ-,β+,e-:  1.276e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  4.746e-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/At-210 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/At-210 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/At-210 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/At-210 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

3.24771e-05

1.295e-02

X-ray

3.84145e-05

1.906e+01

X-ray

2.54406e-03

8.055e-02

X-ray

9.68941e-03

1.334e-02

X-ray

1.10135e-02

2.332e-02

X-ray

1.11319e-02

2.052e-01

X-ray

1.33474e-02

4.024e-02

X-ray

1.34935e-02

1.568e-01

X-ray

1.58015e-02

3.273e-02

X-ray

7.71271e-02

2.413e-01

X-ray

7.96070e-02

4.016e-01

X-ray

8.95836e-02

4.508e-02

X-ray

9.01425e-02

8.748e-02

X-ray

9.25794e-02

1.087e-02

X-ray

9.27190e-02

2.146e-02

X-ray

2.45300e-01

7.946e-01

Gamma

5.27600e-01

1.142e-02

Gamma

8.17200e-01

1.708e-02

Gamma

8.52700e-01

1.381e-02

Gamma

9.55800e-01

1.798e-02

Gamma

1.18140e+00

9.933e-01

Gamma

1.43670e+00

2.900e-01

Gamma

1.48330e+00

4.648e-01

Gamma

1.59950e+00

1.341e-01

Gamma

2.25400e+00

1.520e-02

Gamma

3.94812e-05

4.557e+00

Auger electron

9.72895e-05

5.937e+00

Auger electron

1.22169e-04

1.155e-02

Auger electron

1.74890e-04

3.200e+00

Auger electron

4.37891e-04

7.485e-01

Auger electron

1.12088e-03

2.358e-01

Auger electron

2.01704e-03

1.725e+00

Auger electron

2.31154e-03

2.376e-01

Auger electron

2.74224e-03

1.240e-02

Auger electron

8.51411e-03

4.927e-01

Auger electron

1.10686e-02

2.252e-01

Auger electron

1.36532e-02

2.455e-02

Auger electron

2.27760e-02

4.028e-02

Conversion electron

3.01830e-02

1.327e-01

Conversion electron

3.26630e-02

1.287e-01

Conversion electron

4.31985e-02

7.018e-02

Conversion electron

4.64800e-02

2.228e-02

Conversion electron

6.18768e-02

1.957e-02

Auger electron

7.46184e-02

1.081e-02

Auger electron

1.51876e-01

8.414e-02

Conversion electron

2.28382e-01

1.279e-02

Conversion electron

2.29003e-01

4.332e-02

Conversion electron

2.31483e-01

2.255e-02

Conversion electron

2.42019e-01

2.069e-02

Conversion electron

 

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

 

 

 

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