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Radionuclide Dosimetric Data Sheets

Tungsten-190

Isotope:  W-190
Atomic number (Z):  74
Mass number (A):  190
Neutron number (N):  116

Decay modes:  β-
Half-life:  30.0 [m]
Decay constant:  3.8508e-04 [1/s]
Daughters:  Re-190 (100.0%)
Radioactive daughters:  Re-190

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.47711 [MeV]
Mean photon energy:  0.15111 [MeV]
Air kerma rate constant, Γ₁₀:  1.412e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  1.412e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  7.644e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for alphas, Δ_α:  0.000e+00 [Gy·kg/Bq·s]
Equilibrium dose constant for betas/electrons, Δ_β-,β+,e-:  7.644e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  2.421e-14 [Gy·kg/Bq·s]

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/W-190 DPK.csv

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/W-190 Summary Spectrum.csv

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/W-190 Beta Spectrum.csv

 

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/W-190 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
3.76164e-05	1.190e+01	X-ray
1.84752e-03	4.795e-02	X-ray
7.62641e-03	1.051e-02	X-ray
8.57622e-03	1.796e-02	X-ray
8.64532e-03	1.585e-01	X-ray
1.00312e-02	9.539e-02	X-ray
1.02735e-02	2.840e-02	X-ray
1.17147e-02	1.797e-02	X-ray
5.98631e-02	3.148e-01	X-ray
6.13181e-02	5.442e-01	X-ray
6.91788e-02	5.882e-02	X-ray
6.94956e-02	1.137e-01	X-ray
7.13392e-02	1.346e-02	X-ray
7.14134e-02	2.615e-02	X-ray
1.57600e-01	3.900e-01	Gamma
1.62100e-01	1.100e-01	Gamma
3.13399e-01	1.000e+00	Beta
2.73022e-05	2.341e+00	Auger electron
1.62295e-04	3.992e+00	Auger electron
3.24858e-04	7.818e-01	Auger electron
3.28664e-04	1.480e-01	Auger electron
5.72664e-04	2.350e-01	Auger electron
1.52534e-03	1.893e+00	Auger electron
1.71497e-03	1.343e-01	Auger electron
6.67631e-03	5.872e-01	Auger electron
8.50153e-03	2.289e-01	Auger electron
1.03558e-02	2.214e-02	Auger electron
4.85493e-02	3.202e-02	Auger electron
5.80540e-02	1.687e-02	Auger electron
8.57440e-02	4.781e-01	Conversion electron
9.02440e-02	6.570e-01	Conversion electron
1.45092e-01	6.942e-02	Conversion electron
1.49592e-01	1.401e-01	Conversion electron
1.50107e-01	1.787e-02	Conversion electron
1.51562e-01	2.013e-02	Conversion electron
1.55240e-01	1.751e-02	Conversion electron
1.59740e-01	4.369e-02	Conversion electron
1.62100e-01	1.291e-02	Conversion electron

 

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

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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