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Radionuclide Dosimetric Data Sheets

Rubidium-77

Summary data

General

Classification

Isotope:  Rb-77
Atomic number (Z):  37
Mass number (A):  77
Neutron number (N):  40

Radioactive decay

Decay modes:  β+, Electron capture
Half-life:  3.77 [m]
Decay constant:  3.0643e-03 [1/s]
Daughters:  Kr-77 (100.0%)
Radioactive daughters:  Kr-77

Dosimetric constants

Mean alpha energy:  0.0 [MeV]
Mean electron energy:  1.68653 [MeV]
Mean photon energy:  1.54522 [MeV]
Air kerma rate constant, Γ10:  2.408e-17 [Gy·m2/Bq·s]
Air kerma coefficient, Kair:  6.136e-17 [Gy·m2/Bq·s]
Equilibrium dose constant for weakly-penetrating radiations (α and/or electrons), Δwp:  2.702e-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-:  2.702e-13 [Gy·kg/Bq·s]
Equilibrium dose constant for photons, Δp:  2.476e-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/Rb-77 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/Rb-77 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/Rb-77 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/Rb-77 Summary Spectrum.csv

 

Energy [MeV]

Yield [#/nt] if > 0.01

Radiation type

1.93797e-05

1.487e+00

X-ray

1.25517e-02

3.673e-02

X-ray

1.26066e-02

7.083e-02

X-ray

1.40730e-02

1.008e-02

X-ray

6.65200e-02

5.700e-01

Gamma

1.49930e-01

4.332e-02

Gamma

1.78780e-01

2.217e-01

Gamma

2.54300e-01

1.778e-02

Gamma

3.93370e-01

9.747e-02

Gamma

4.68990e-01

1.186e-02

Gamma

5.11000e-01

1.926e+00

Annihilation photon

5.45230e-01

1.140e-02

Gamma

5.77200e-01

1.197e-02

Gamma

6.08600e-01

2.451e-02

Gamma

6.26690e-01

3.192e-02

Gamma

6.47880e-01

2.565e-02

Gamma

6.66800e-01

1.368e-02

Gamma

7.79800e-01

1.083e-02

Gamma

8.05600e-01

1.425e-02

Gamma

9.58700e-01

1.545e-02

Gamma

9.70870e-01

2.348e-02

Gamma

9.88270e-01

1.750e-02

Gamma

9.88270e-01

1.750e-02

Gamma

1.03743e+00

1.186e-02

Gamma

1.15379e+00

1.072e-02

Gamma

1.02523e+00

3.773e-02

Positron

1.11258e+00

1.787e-02

Positron

1.19026e+00

1.211e-02

Positron

1.39269e+00

1.092e-02

Positron

1.43482e+00

1.092e-02

Positron

1.45642e+00

2.681e-02

Positron

1.49025e+00

1.191e-02

Positron

1.49625e+00

1.390e-02

Positron

1.50186e+00

1.589e-02

Positron

1.56896e+00

2.085e-02

Positron

1.60780e+00

1.291e-02

Positron

1.64416e+00

2.780e-02

Positron

1.66296e+00

2.284e-02

Positron

1.75733e+00

1.589e-02

Positron

1.76589e+00

7.049e-02

Positron

1.86886e+00

1.261e-01

Positron

1.92263e+00

1.489e-02

Positron

1.95485e+00

2.681e-01

Positron

1.98687e+00

1.489e-01

Positron

5.62679e-05

6.506e-01

Auger electron

6.55008e-05

2.553e-01

Auger electron

9.91466e-05

4.589e-02

Auger electron

1.40701e-03

2.282e-01

Auger electron

1.51163e-03

1.648e-02

Auger electron

1.07980e-02

5.238e-02

Auger electron

1.23371e-02

1.662e-02

Auger electron

5.22400e-02

1.526e-01

Conversion electron

6.46177e-02

1.407e-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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