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Radionuclide Dosimetric Data Sheets

Indium-119m

Summary data

General

Classification

Isotope:  In-119m
Atomic number (Z):  49
Mass number (A):  119
Neutron number (N):  70

Radioactive decay

Decay modes:  β-, Internal transition
Half-life:  18.0 [m]
Decay constant:  6.4180e-04 [1/s]
Daughters:  In-119 (5.6%), Sn-119 (94.4%)
Radioactive daughters:  In-119

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  1.02214 [MeV]
Mean photon energy:  0.06603 [MeV]
Air kerma rate constant, Γ10:  2.974e-18 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  2.974e-18 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  1.638e-13 [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-:  1.638e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  1.058e-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/In-119m 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/In-119m 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/In-119m 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/In-119m Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

8.12532e-06

4.779e-01

X-ray

1.08560e-05

4.169e+00

X-ray

2.38670e-02

5.652e-02

Gamma

2.41926e-02

1.232e-02

X-ray

3.11390e-01

2.195e-02

Gamma

1.06555e+00

1.794e-02

Gamma

1.24971e+00

1.022e-02

Gamma

5.27980e-01

1.227e-02

Beta

6.04452e-01

2.077e-02

Beta

1.08290e+00

3.210e-01

Beta

1.09397e+00

5.760e-01

Beta

8.85921e-06

2.370e-01

Auger electron

1.13834e-05

2.058e+00

Auger electron

2.99892e-05

7.633e-01

Auger electron

3.35242e-05

8.337e-02

Auger electron

1.18537e-04

2.608e-01

Auger electron

1.25669e-04

2.600e-02

Auger electron

3.23549e-04

1.213e-01

Auger electron

3.70902e-04

5.857e-02

Auger electron

4.02676e-04

4.402e-01

Auger electron

4.93048e-04

1.059e-02

Auger electron

2.73516e-03

2.319e-02

Auger electron

2.96885e-03

1.720e-01

Auger electron

3.50197e-03

4.535e-02

Auger electron

1.94267e-02

2.157e-01

Conversion electron

1.97062e-02

1.765e-02

Conversion electron

2.31567e-02

4.689e-02

Conversion electron

2.38670e-02

1.055e-02

Conversion electron

2.83469e-01

2.674e-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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