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Radionuclide Dosimetric Data Sheets

Hafnium-184

Summary data

General

Classification

Isotope:  Hf-184
Atomic number (Z):  72
Mass number (A):  184
Neutron number (N):  112

Radioactive decay

Decay modes:  β-
Half-life:  4.12 [h]
Decay constant:  4.6733e-05 [1/s]
Daughters:  Ta-184 (100.0%)
Radioactive daughters:  Ta-184

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.47868 [MeV]
Mean photon energy:  0.23867 [MeV]
Air kerma rate constant, Γ10:  1.096e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  1.096e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  7.669e-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-:  7.669e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  3.824e-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/Hf-184 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/Hf-184 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/Hf-184 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/Hf-184 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

2.48902e-05

2.721e+01

X-ray

1.70765e-03

8.903e-02

X-ray

7.19450e-03

1.757e-02

X-ray

8.07690e-03

2.953e-02

X-ray

8.13761e-03

2.607e-01

X-ray

9.19462e-03

2.445e-02

X-ray

9.36071e-03

1.752e-01

X-ray

9.47190e-03

3.108e-02

X-ray

9.64849e-03

4.574e-02

X-ray

1.09205e-02

3.224e-02

X-ray

4.14000e-02

9.207e-02

Gamma

4.39000e-02

5.673e-02

Gamma

4.79000e-02

1.116e-02

Gamma

5.64020e-02

8.321e-02

X-ray

5.76858e-02

1.450e-01

X-ray

6.51037e-02

1.552e-02

X-ray

6.53809e-02

2.999e-02

X-ray

1.39100e-01

4.464e-01

Gamma

1.81000e-01

1.376e-01

Gamma

3.44900e-01

3.515e-01

Gamma

2.28681e-01

3.600e-01

Beta

2.90064e-01

1.500e-01

Beta

3.77799e-01

4.900e-01

Beta

1.20060e-05

2.403e+00

Auger electron

2.73588e-05

3.384e+00

Auger electron

1.60504e-04

9.244e+00

Auger electron

3.04195e-04

3.113e-01

Auger electron

3.16615e-04

1.786e+00

Auger electron

5.66536e-04

7.954e-01

Auger electron

1.41826e-03

4.112e+00

Auger electron

1.60094e-03

2.385e-01

Auger electron

1.84053e-03

1.406e-02

Auger electron

6.40725e-03

1.210e+00

Auger electron

8.10379e-03

4.578e-01

Auger electron

9.83498e-03

4.345e-02

Auger electron

2.97440e-02

6.542e-01

Conversion electron

3.02370e-02

6.098e-02

Conversion electron

3.22440e-02

3.391e-01

Conversion electron

3.27370e-02

3.155e-02

Conversion electron

3.67370e-02

3.878e-01

Conversion electron

3.80208e-02

4.274e-01

Conversion electron

3.92159e-02

1.641e-01

Conversion electron

4.14000e-02

4.817e-02

Conversion electron

4.17159e-02

8.501e-02

Conversion electron

4.39000e-02

2.496e-02

Conversion electron

4.57159e-02

2.065e-01

Conversion electron

4.79000e-02

5.629e-02

Conversion electron

7.15350e-02

2.877e-01

Conversion electron

1.27444e-01

3.534e-02

Conversion electron

1.27937e-01

8.734e-02

Conversion electron

1.29221e-01

6.987e-02

Conversion electron

1.36916e-01

4.778e-02

Conversion electron

1.39100e-01

1.326e-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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