<= Return to MIRDspec isotope database


Radionuclide Dosimetric Data Sheets

Thallium-210

Summary data

General

Classification

Isotope:  Tl-210
Atomic number (Z):  81
Mass number (A):  210
Neutron number (N):  129

Radioactive decay

Decay modes:  β-
Half-life:  1.3 [m]
Decay constant:  8.8865e-03 [1/s]
Daughters:  Pb-210 (100.0%)
Radioactive daughters:  Pb-210

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  1.26989 [MeV]
Mean photon energy:  2.76317 [MeV]
Air kerma rate constant, Γ10:  1.020e-16 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  1.020e-16 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  2.035e-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-:  2.035e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  4.427e-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/Tl-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/Tl-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/Tl-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/Tl-210 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

2.66326e-05

7.791e+00

X-ray

2.38657e-03

2.900e-02

X-ray

1.05510e-02

6.852e-02

X-ray

1.26275e-02

1.319e-02

X-ray

1.26563e-02

8.416e-02

X-ray

1.48158e-02

1.719e-02

X-ray

7.30390e-02

2.426e-02

X-ray

7.52501e-02

4.075e-02

X-ray

8.30000e-02

1.979e-02

Gamma

9.70000e-02

3.958e-02

Gamma

2.96000e-01

7.917e-01

Gamma

3.56000e-01

3.958e-02

Gamma

3.82000e-01

2.969e-02

Gamma

4.80000e-01

1.979e-02

Gamma

6.70000e-01

1.979e-02

Gamma

7.99600e-01

9.896e-01

Gamma

8.60000e-01

6.927e-02

Gamma

9.10000e-01

2.969e-02

Gamma

1.07000e+00

1.188e-01

Gamma

1.11000e+00

6.927e-02

Gamma

1.21000e+00

1.682e-01

Gamma

1.31600e+00

2.078e-01

Gamma

1.41000e+00

4.948e-02

Gamma

1.49000e+00

1.979e-02

Gamma

1.54000e+00

1.979e-02

Gamma

1.59000e+00

1.979e-02

Gamma

1.65000e+00

1.979e-02

Gamma

2.01000e+00

6.927e-02

Gamma

2.09000e+00

4.948e-02

Gamma

2.27000e+00

2.969e-02

Gamma

2.36000e+00

7.917e-02

Gamma

2.43000e+00

8.906e-02

Gamma

4.80315e-01

1.942e-02

Beta

5.70792e-01

6.796e-02

Beta

6.77046e-01

2.330e-01

Beta

7.45718e-01

9.709e-02

Beta

8.80153e-01

9.709e-02

Beta

1.63876e+00

2.913e-01

Beta

1.76589e+00

1.942e-01

Beta

4.22616e-05

1.750e+00

Auger electron

8.25391e-05

2.522e+00

Auger electron

1.74625e-04

1.343e+00

Auger electron

4.32944e-04

3.018e-01

Auger electron

1.39487e-03

4.743e-02

Auger electron

1.92070e-03

6.991e-01

Auger electron

2.18563e-03

8.766e-02

Auger electron

8.24571e-03

2.077e-01

Auger electron

8.71000e-03

1.993e-02

Conversion electron

1.06310e-02

9.220e-02

Auger electron

6.77490e-02

1.117e-01

Conversion electron

6.99600e-02

9.491e-02

Conversion electron

7.99454e-02

5.569e-02

Conversion electron

8.17490e-02

1.088e-01

Conversion electron

8.30000e-02

1.710e-02

Conversion electron

8.39600e-02

8.786e-02

Conversion electron

9.39454e-02

5.337e-02

Conversion electron

9.70000e-02

1.641e-02

Conversion electron

2.07710e-01

5.334e-02

Conversion electron

2.80749e-01

1.636e-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

 

 

 

MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)

<= Return to MIRDspec isotope database