55-Cs-139
Spin
Level energy(keV) Spin & Parity
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ground state 7/2+
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)
138.913363758 ± 0.000003367 (amu) [mass excess = -80701.140 ± 3.137 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
4212.829 ± 3.123 (keV)
Strong Gamma-rays from Decay of Cs-139 (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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627.24 1.52 B-
1283.23 7.1 B-
1420.66 0.78 B-
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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
B- 9.27 M 5
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Ba-140 (Z= 56, A=140), MT= 28 (n,np)
Ba-140 (Z= 56, A=140), MT=104 (n,d)
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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Cs-139 U-235 Thermal 1.303880e-02 5.215510e-04
Cs-139 U-235 Fast 2.092310e-02 9.415410e-03
Cs-139 U-235 High 2.367510e-02 7.576030e-03
Cs-139 U-238 Fast 3.474380e-03 2.223600e-03
Cs-139 U-238 High 1.387990e-02 4.441540e-03
Cs-139 Pu-239 Thermal 2.323800e-02 5.344750e-03
Cs-139 Pu-239 Fast 2.256710e-02 7.221480e-03
Cs-139 Pu-239 High 2.261050e-02 7.235350e-03
Cs-139 Pu-241 Thermal 1.265890e-02 4.050830e-03
Cs-139 Pu-241 Fast 1.129100e-02 3.613110e-03
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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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Cs-139 U-235 Thermal 6.335690e-02 6.407510e-04
Cs-139 U-235 Fast 6.310320e-02 6.956670e-03
Cs-139 U-235 High 4.428100e-02 7.074850e-03
Cs-139 U-238 Fast 5.674180e-02 4.534430e-03
Cs-139 U-238 High 4.784350e-02 5.256360e-03
Cs-139 Pu-239 Thermal 5.408820e-02 4.327840e-03
Cs-139 Pu-239 Fast 5.370910e-02 4.297420e-03
Cs-139 Pu-239 High 3.322060e-02 7.635850e-03
Cs-139 Pu-241 Thermal 6.188080e-02 4.949500e-03
Cs-139 Pu-241 Fast 6.271800e-02 6.904160e-03
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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