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Radionuclide Dosimetric Data Sheets

Lutetium-178m

Summary data

General

Classification

Isotope:  Lu-178m
Atomic number (Z):  71
Mass number (A):  178
Neutron number (N):  107

Radioactive decay

Decay modes:  β-
Half-life:  23.1 [m]
Decay constant:  5.0011e-04 [1/s]
Daughters:  Hf-178 (100.0%)
Radioactive daughters:  None

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  0.49073 [MeV]
Mean photon energy:  1.04813 [MeV]
Air kerma rate constant, Γ10:  3.936e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  3.936e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  7.862e-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-:  7.862e-14 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  1.679e-13 [Gy·kg/Bq·s]

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/Lu-178m 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/Lu-178m 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/Lu-178m Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.94288e-05

1.199e+01

X-ray

1.63870e-03

3.640e-02

X-ray

7.83281e-03

1.386e-02

X-ray

7.88959e-03

1.223e-01

X-ray

9.03751e-03

1.055e-01

X-ray

9.34358e-03

2.125e-02

X-ray

1.05374e-02

1.918e-02

X-ray

5.47191e-02

1.771e-01

X-ray

5.59237e-02

3.098e-01

X-ray

6.31238e-02

3.298e-02

X-ray

6.33831e-02

6.374e-02

X-ray

6.51063e-02

1.436e-02

X-ray

8.88500e-02

6.436e-01

Gamma

9.31500e-02

1.722e-01

Gamma

2.13410e-01

8.140e-01

Gamma

2.16640e-01

2.484e-02

Gamma

3.25600e-01

9.410e-01

Gamma

3.31620e-01

1.139e-01

Gamma

4.26360e-01

9.702e-01

Gamma

2.36770e-01

1.300e-01

Beta

2.79909e-01

3.299e-02

Beta

3.64136e-01

8.368e-01

Beta

1.07469e-05

1.040e+00

Auger electron

2.44607e-05

1.477e+00

Auger electron

1.59934e-04

4.179e+00

Auger electron

2.81819e-04

1.314e-01

Auger electron

3.02926e-04

7.067e-01

Auger electron

6.96754e-04

1.318e-01

Auger electron

1.36568e-03

1.823e+00

Auger electron

1.54449e-03

9.618e-02

Auger electron

6.19070e-03

5.945e-01

Auger electron

7.81045e-03

2.207e-01

Auger electron

9.46011e-03

2.065e-02

Auger electron

2.33680e-02

2.568e-01

Conversion electron

2.76680e-02

1.889e-01

Conversion electron

4.45280e-02

1.963e-02

Auger electron

5.31026e-02

1.016e-02

Auger electron

7.76050e-02

2.684e-02

Conversion electron

8.19050e-02

1.926e-02

Conversion electron

8.23870e-02

2.373e-01

Conversion electron

8.35917e-02

2.233e-01

Conversion electron

8.67510e-02

1.026e-02

Conversion electron

9.10510e-02

1.201e-01

Conversion electron

9.31500e-02

3.255e-02

Conversion electron

1.47928e-01

1.134e-01

Conversion electron

2.02165e-01

1.294e-02

Conversion electron

2.02647e-01

2.675e-02

Conversion electron

2.03852e-01

1.863e-02

Conversion electron

2.11311e-01

1.431e-02

Conversion electron

2.60118e-01

4.171e-02

Conversion electron

2.66138e-01

1.408e-02

Conversion electron

3.60878e-01

2.152e-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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