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Radionuclide Dosimetric Data Sheets

Tantalum-182m

Summary data

General

Classification

Isotope:  Ta-182m
Atomic number (Z):  73
Mass number (A):  182
Neutron number (N):  109

Radioactive decay

Decay modes:  Internal transition
Half-life:  15.84 [m]
Decay constant:  7.2932e-04 [1/s]
Daughters:  Ta-182 (100.0%)
Radioactive daughters:  Ta-182

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.26647 [MeV]
Mean photon energy:  0.2659 [MeV]
Air kerma rate constant, Γ10:  1.097e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  1.097e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  4.269e-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-:  4.269e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  4.260e-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/Ta-182m 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/Ta-182m Summary 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/Ta-182m Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

2.49606e-05

2.402e+01

X-ray

1.70698e-03

7.945e-02

X-ray

7.19450e-03

1.770e-02

X-ray

8.07690e-03

2.974e-02

X-ray

8.13761e-03

2.626e-01

X-ray

9.19462e-03

1.438e-02

X-ray

9.36070e-03

1.548e-01

X-ray

9.47190e-03

1.827e-02

X-ray

9.64848e-03

4.608e-02

X-ray

1.09205e-02

2.849e-02

X-ray

5.64020e-02

2.806e-01

X-ray

5.76858e-02

4.891e-01

X-ray

6.51037e-02

5.235e-02

X-ray

6.53809e-02

1.011e-01

X-ray

6.71036e-02

1.184e-02

X-ray

6.71676e-02

2.293e-02

X-ray

1.46785e-01

3.648e-01

Gamma

1.71586e-01

4.800e-01

Gamma

1.84951e-01

2.400e-01

Gamma

3.18400e-01

6.720e-02

Gamma

1.19801e-05

2.102e+00

Auger electron

2.73581e-05

2.977e+00

Auger electron

1.60429e-04

8.170e+00

Auger electron

3.01148e-04

2.696e-01

Auger electron

3.12727e-04

1.558e+00

Auger electron

5.92102e-04

4.995e-01

Auger electron

1.41792e-03

3.673e+00

Auger electron

1.59968e-03

2.134e-01

Auger electron

1.83994e-03

1.263e-02

Auger electron

4.60700e-03

4.377e-01

Conversion electron

5.10000e-03

1.835e-02

Conversion electron

6.33859e-03

1.125e+00

Auger electron

6.38380e-03

2.764e-01

Conversion electron

8.02791e-03

4.245e-01

Auger electron

9.74854e-03

4.018e-02

Auger electron

1.40789e-02

1.945e-01

Conversion electron

1.62630e-02

5.699e-02

Conversion electron

4.58458e-02

2.988e-02

Auger electron

5.47234e-02

1.557e-02

Auger electron

7.92200e-02

4.613e-01

Conversion electron

1.04021e-01

3.910e-01

Conversion electron

1.17386e-01

1.517e-01

Conversion electron

1.35129e-01

6.594e-02

Conversion electron

1.44601e-01

1.645e-02

Conversion electron

1.59930e-01

5.598e-02

Conversion electron

1.69402e-01

1.393e-02

Conversion electron

1.73295e-01

2.432e-02

Conversion electron

1.73788e-01

2.810e-01

Conversion electron

1.75072e-01

1.682e-01

Conversion electron

1.82767e-01

1.235e-01

Conversion electron

1.84951e-01

3.430e-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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