37-Rb-81
Spin
Level energy(keV) Spin & Parity
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ground state 3/2-
8.63100E+01 9/2+
Mass (The Ame2012 atomic mass evaluation (II) by M.Wang, G.Audi, A.H.Wapstra, F.G.Kondev, M.MacCormick, X.Xu, and B.Pfeiffer
Chinese Physics C36 p. 1603-2014, December 2012)
80.918993936 ± 0.000005265 (amu) [mass excess = -75456.663 ± 4.904 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-3928.538 ± 5.817 (keV)
Strong Gamma-rays from Decay of Rb- 81 (Compiled from ENSDF as of March 2011)
[ Intensities before May 23th of 2013 were values when total intensity of the decay mode was 100(%) and a branching ratio of each decay mode was not multiplied. ]
γ-ray energy(keV) Intensity(%) Decay mode
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190.46 64.86 EC
446.15 23.5 EC
510.43 5.41 EC
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86.26 5.22 IT
49.5 0.74 EC
643.6 0.11 EC
1194.6 0.11 EC
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*: relative, ~ approximate, ? calculated or estimatted
>: greater than or equal to, <: less than or equal to
[ Intensities; total intensity of the nuclide is 100(%). ]
Decay data(Chart of the Nuclides 2014)
Decay mode Half-life
EC 4.572 H 4
EC 30.5 M 3
IT 30.5 M 3
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Fission Yields for Fission Products in JENDL-4.0 Fission Yield Data
- Neutron-induced Fission Yields (from main actinide nuclides) - Independent Fission Yield -
Product Nuclide Energy Fission Yield Uncertainty(1σ)
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Rb- 81 U-235 High 9.654400e-15 6.178830e-15
Rb- 81 Pu-239 Thermal 3.744720e-15 2.396620e-15
Rb- 81 Pu-239 High 1.361080e-13 8.710920e-14
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Thermal=0.0253eV, Fast=500keV(Fast reactor spectrum), High=14MeV
- Neutron-induced Fission Yields (from main actinide nuclides) - Cumulative Fission Yield -
Product Nuclide Energy Fission Yield Uncertainty(1σ)
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Rb- 81 U-235 High 9.654400e-15 6.178830e-15
Rb- 81 Pu-239 Thermal 3.744720e-15 2.396620e-15
Rb- 81 Pu-239 High 1.361080e-13 8.710920e-14
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Thermal=0.0253eV, Fast=500keV(Fast reactor spectrum), High=14MeV
→ Neutron-induced and Spontaneous Fission Yields of all nuclides in JENDL-4.0 Fission Yield Data