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Radionuclide Dosimetric Data Sheets

Thulium-175

Summary data

General

Classification

Isotope:  Tm-175
Atomic number (Z):  69
Mass number (A):  175
Neutron number (N):  106

Radioactive decay

Decay modes:  β-
Half-life:  15.2 [m]
Decay constant:  7.6003e-04 [1/s]
Daughters:  Yb-175 (100.0%)
Radioactive daughters:  Yb-175

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.51957 [MeV]
Mean photon energy:  1.08477 [MeV]
Air kerma rate constant, Γ10:  3.980e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  3.980e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  8.324e-14 [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-:  8.324e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  1.738e-13 [Gy·kg/Bq·s]

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/Tm-175 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/Tm-175 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/Tm-175 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

8.60682e-06

3.231e+00

X-ray

7.40530e-03

2.775e-02

X-ray

8.41451e-03

1.857e-02

X-ray

5.14483e-02

5.263e-02

X-ray

5.25072e-02

9.275e-02

X-ray

5.95058e-02

1.889e-02

X-ray

3.63800e-01

1.270e-01

Gamma

3.94000e-01

3.358e-02

Gamma

4.36200e-01

2.482e-02

Gamma

4.77200e-01

2.964e-02

Gamma

5.14700e-01

6.497e-01

Gamma

5.34400e-01

1.898e-02

Gamma

5.76900e-01

1.197e-02

Gamma

6.39000e-01

6.424e-02

Gamma

8.11200e-01

4.307e-02

Gamma

8.57800e-01

6.030e-02

Gamma

8.94300e-01

7.738e-02

Gamma

9.41000e-01

1.460e-01

Gamma

9.53900e-01

1.971e-02

Gamma

9.82100e-01

1.022e-01

Gamma

1.37690e+00

3.066e-02

Gamma

1.52510e+00

1.226e-02

Gamma

9.02906e-02

1.457e-02

Beta

1.53103e-01

8.070e-02

Beta

1.62508e-01

1.782e-02

Beta

1.87612e-01

3.354e-02

Beta

2.97873e-01

3.888e-01

Beta

3.08864e-01

1.886e-02

Beta

5.01165e-01

5.764e-02

Beta

5.31298e-01

1.300e-01

Beta

5.77159e-01

3.249e-02

Beta

7.04086e-01

1.991e-01

Beta

9.44954e-06

2.842e-01

Auger electron

1.88620e-05

4.017e-01

Auger electron

1.54728e-04

1.168e+00

Auger electron

2.48617e-04

3.582e-02

Auger electron

2.63102e-04

2.069e-01

Auger electron

9.00243e-04

3.995e-02

Auger electron

1.25706e-03

4.668e-01

Auger electron

1.43111e-03

2.108e-02

Auger electron

5.84018e-03

1.508e-01

Auger electron

7.33603e-03

5.444e-02

Auger electron

2.65590e-02

1.133e-02

Conversion electron

3.60460e-02

3.942e-02

Conversion electron

7.80074e-02

1.315e-02

Conversion electron

7.90662e-02

1.294e-02

Conversion electron

4.53259e-01

1.608e-01

Conversion electron

5.04246e-01

2.814e-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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