63-Eu-158
Spin
Level energy(keV) Spin & Parity
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ground state (1-)
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)
157.927798606 ± 0.000011008 (amu) [mass excess = -67255.165 ± 10.255 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
3433.727 ± 10.382 (keV)
Strong Gamma-rays from Decay of Eu-158 (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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897.61 12.36 B-
944.15 30. B-
977.14 16.29 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- 45.9 M 2
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Eu-157 (Z= 63, A=157), MT=102 (n,γ)
Gd-158 (Z= 64, A=158), MT=103 (n,p)
Gd-160 (Z= 64, A=160), MT= 32 (n,nd)
Gd-160 (Z= 64, A=160), MT=105 (n,t)
Tb-160 (Z= 65, A=160), MT=106 (n,3He)
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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Eu-158 U-235 Thermal 1.277970e-06 8.178970e-07
Eu-158 U-235 Fast 1.387140e-06 8.877670e-07
Eu-158 U-235 High 7.809710e-05 4.998210e-05
Eu-158 U-238 Fast 7.762890e-07 4.968250e-07
Eu-158 U-238 High 1.387510e-05 8.880070e-06
Eu-158 Pu-239 Thermal 5.379150e-05 3.442660e-05
Eu-158 Pu-239 Fast 1.024630e-04 6.557650e-05
Eu-158 Pu-239 High 3.712410e-04 2.375940e-04
Eu-158 Pu-241 Thermal 1.775290e-05 1.136180e-05
Eu-158 Pu-241 Fast 4.175860e-05 2.672550e-05
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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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Eu-158 U-235 Thermal 3.278720e-05 5.255980e-06
Eu-158 U-235 Fast 6.481020e-05 2.078100e-05
Eu-158 U-235 High 2.288770e-04 5.256390e-05
Eu-158 U-238 Fast 1.849420e-04 5.915880e-05
Eu-158 U-238 High 4.262920e-04 1.362640e-04
Eu-158 Pu-239 Thermal 4.127970e-04 1.321170e-04
Eu-158 Pu-239 Fast 6.527260e-04 2.089020e-04
Eu-158 Pu-239 High 6.453740e-04 2.902280e-04
Eu-158 Pu-241 Thermal 9.225440e-04 2.951610e-04
Eu-158 Pu-241 Fast 1.118320e-03 3.581320e-04
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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