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Radionuclide Dosimetric Data Sheets

Indium-103

Summary data

General

Classification

Isotope:  In-103
Atomic number (Z):  49
Mass number (A):  103
Neutron number (N):  54

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  60.0 [s]
Decay constant:  1.1552e-02 [1/s]
Daughters:  Cd-103 (100.0%)
Radioactive daughters:  Cd-103

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  1.54041 [MeV]
Mean photon energy:  2.75279 [MeV]
Air kerma rate constant, Γ10:  6.166e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  9.577e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  2.468e-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-:  2.468e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  4.410e-13 [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-103 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-103 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-103 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-103 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.71477e-05

1.288e+00

X-ray

2.29571e-02

3.649e-02

X-ray

2.31527e-02

6.858e-02

X-ray

2.60753e-02

1.175e-02

X-ray

1.87910e-01

4.850e-01

Gamma

2.01810e-01

8.390e-02

Gamma

3.67500e-01

3.686e-02

Gamma

3.91700e-01

2.716e-02

Gamma

5.11000e-01

1.762e+00

Annihilation photon

5.52100e-01

1.164e-02

Gamma

5.69400e-01

2.183e-02

Gamma

7.19900e-01

1.649e-01

Gamma

7.26290e-01

8.585e-02

Gamma

7.39800e-01

1.600e-01

Gamma

7.40400e-01

1.067e-02

Gamma

7.54400e-01

2.134e-02

Gamma

7.72400e-01

2.377e-02

Gamma

9.16700e-01

8.827e-02

Gamma

9.19800e-01

2.570e-02

Gamma

9.94800e-01

1.164e-02

Gamma

1.04000e+00

1.406e-02

Gamma

1.10730e+00

3.540e-02

Gamma

1.14500e+00

1.018e-02

Gamma

1.18030e+00

1.213e-02

Gamma

1.18100e+00

1.940e-02

Gamma

1.32680e+00

2.328e-02

Gamma

1.33110e+00

1.067e-02

Gamma

1.41050e+00

1.988e-02

Gamma

1.42570e+00

1.698e-02

Gamma

1.47410e+00

1.115e-02

Gamma

1.91520e+00

2.183e-02

Gamma

1.97200e+00

2.474e-02

Gamma

1.97200e+00

2.474e-02

Gamma

2.21170e+00

1.892e-02

Gamma

2.38630e+00

1.115e-02

Gamma

2.45280e+00

1.261e-02

Gamma

2.58500e+00

1.358e-02

Gamma

3.30500e+00

1.649e-02

Gamma

6.84305e-01

1.205e-02

Positron

9.89134e-01

1.469e-02

Positron

1.00832e+00

1.293e-02

Positron

1.21134e+00

1.332e-02

Positron

1.34650e+00

2.840e-02

Positron

1.37272e+00

1.038e-02

Positron

1.38429e+00

4.603e-02

Positron

1.40881e+00

1.547e-02

Positron

1.47457e+00

1.214e-02

Positron

1.49108e+00

1.263e-02

Positron

1.53006e+00

1.763e-02

Positron

1.55698e+00

1.077e-02

Positron

1.56014e+00

2.448e-02

Positron

1.60054e+00

2.154e-02

Positron

1.61556e+00

3.232e-02

Positron

1.66853e+00

3.525e-02

Positron

1.68836e+00

1.058e-02

Positron

1.79238e+00

6.855e-02

Positron

1.79375e+00

7.541e-02

Positron

1.80881e+00

2.057e-02

Positron

1.88740e+00

7.834e-02

Positron

1.96743e+00

7.149e-02

Positron

1.97393e+00

2.154e-02

Positron

2.04881e+00

2.840e-02

Positron

2.23159e+00

1.253e-01

Positron

3.67791e-05

4.549e-01

Auger electron

1.28131e-04

1.326e-01

Auger electron

1.65827e-04

2.771e-02

Auger electron

3.45320e-04

3.177e-01

Auger electron

2.61011e-03

1.227e-01

Auger electron

3.05309e-03

2.824e-02

Auger electron

1.92752e-02

1.619e-02

Auger electron

1.61222e-01

3.480e-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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