63-Eu-149
Spin
Level energy(keV) Spin & Parity
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ground state 5/2+
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)
148.917937763 ± 0.000004393 (amu) [mass excess = -76440.481 ± 4.092 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-1313.737 ± 4.147 (keV)
Strong Gamma-rays from Decay of Eu-149 (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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22.51 2.32 EC
277.09 3.56 EC
327.53 4.03 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 93.1 D 4
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Eu-151 (Z= 63, A=151), MT= 17 (n,3n)
Gd-152 (Z= 64, A=152), MT= 33 (n,nt)
Dy-154 (Z= 66, A=154), MT= 45 (n,npα)
Dy-154 (Z= 66, A=154), MT=117 (n,dα)
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-149 U-235 High 4.696440e-12 3.005720e-12
Eu-149 Pu-239 Fast 1.049830e-14 6.718910e-15
Eu-149 Pu-239 High 8.505520e-10 5.443530e-10
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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-149 U-235 High 4.696440e-12 3.001270e-12
Eu-149 Pu-239 Fast 1.049830e-14 6.718910e-15
Eu-149 Pu-239 High 8.505520e-10 5.440000e-10
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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