<= Return to MIRDspec isotope database

Radionuclide Dosimetric Data Sheets

Gadolinium-145

Isotope:  Gd-145
Atomic number (Z):  64
Mass number (A):  145
Neutron number (N):  81

Decay modes:  β+, Electron capture
Half-life:  23.0 [m]
Decay constant:  5.0228e-04 [1/s]
Daughters:  Eu-145 (100.0%)
Radioactive daughters:  Eu-145

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.34561 [MeV]
Mean photon energy:  2.42358 [MeV]
Air kerma rate constant, Γ₁₀:  6.523e-17 [Gy·m²/Bq·s]
Air kerma coefficient, K_air:  7.771e-17 [Gy·m²/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δ_wp:  5.537e-14 [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-:  5.537e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δ_p:  3.883e-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/Gd-145 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/Gd-145 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/Gd-145 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/Gd-145 Summary Spectrum.csv

 

Energy [MeV]	Yield [#/nt] if > 0.01	Radiation type
1.42273e-05	6.417e+00	X-ray
5.83100e-03	4.104e-02	X-ray
6.45760e-03	2.623e-02	X-ray
4.09430e-02	1.530e-01	X-ray
4.15992e-02	2.759e-01	X-ray
4.69640e-02	2.785e-02	X-ray
4.70984e-02	5.388e-02	X-ray
4.83077e-02	1.177e-02	X-ray
3.29900e-01	2.700e-02	Gamma
5.11000e-01	6.448e-01	Annihilation photon
8.08400e-01	8.600e-02	Gamma
9.52600e-01	1.500e-02	Gamma
1.04180e+00	9.900e-02	Gamma
1.07230e+00	2.800e-02	Gamma
1.60010e+00	1.760e-02	Gamma
1.71910e+00	1.050e-02	Gamma
1.75790e+00	3.420e-01	Gamma
1.88060e+00	3.260e-01	Gamma
2.49480e+00	1.330e-02	Gamma
2.64220e+00	2.090e-02	Gamma
9.68901e-01	1.150e-01	Positron
1.02448e+00	1.267e-01	Positron
1.35224e+00	4.580e-02	Positron
1.58398e-05	4.542e-01	Auger electron
1.05181e-04	3.111e-01	Auger electron
1.13014e-04	2.768e+00	Auger electron
1.79206e-04	4.402e-01	Auger electron
5.43524e-04	8.787e-02	Auger electron
8.53994e-04	9.459e-01	Auger electron
1.02636e-03	5.829e-02	Auger electron
4.61895e-03	3.489e-01	Auger electron
5.72028e-03	1.202e-01	Auger electron
6.85584e-03	1.037e-02	Auger electron
3.36229e-02	2.508e-02	Auger electron
3.97850e-02	1.231e-02	Auger electron

 

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

 

 

 

MIRDsoft MIRDspecs version 20250101 (www.mirdsoft.org)

<= Return to MIRDspec isotope database