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Radionuclide Dosimetric Data Sheets

Chlorine-39

Isotope:  Cl-39
Atomic number (Z):  17
Mass number (A):  39
Neutron number (N):  22

Decay modes:  β-
Half-life:  55.6 [m]
Decay constant:  2.0778e-04 [1/s]
Daughters:  Ar-39 (100.0%)
Radioactive daughters:  Ar-39

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.82463 [MeV]
Mean photon energy:  1.45089 [MeV]
Air kerma rate constant, Γ₁₀:  4.868e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  4.868e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  1.321e-13 [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-:  1.321e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  2.325e-13 [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/Cl-39 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/Cl-39 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/Cl-39 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/Cl-39 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
2.50332e-01	4.626e-01	Gamma
9.85864e-01	2.090e-02	Gamma
1.09106e+00	2.417e-02	Gamma
1.26719e+00	5.360e-01	Gamma
1.51751e+00	3.924e-01	Gamma
3.46877e-01	2.242e-02	Beta
4.09442e-01	2.562e-02	Beta
7.90718e-01	8.307e-01	Beta
9.07967e-01	4.504e-02	Beta
1.52973e+00	7.006e-02	Beta

 

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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