63-Eu-157
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)
156.925433446 ± 0.000004639 (amu) [mass excess = -69458.297 ± 4.322 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
1364.524 ± 4.218 (keV)
Strong Gamma-rays from Decay of Eu-157 (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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63.93 22.99 B-
370.51 11. B-
410.72 17.49 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- 15.18 H 3
Cross Sections (taken from JENDL-4.0)
Table of cross sections, Eu-157.
Figures of cross sections, Eu-157: type-1: type-2: type-3.
type-1: total, elastic and inelastic scattering, capture and fision cross sections
type-2: same as type-1 but cross sections are averaged in 70 energy group intervals
type-3: threshold reaction cross sections
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Eu-156 (Z= 63, A=156), MT=102 (n,γ)
Eu-157 (Z= 63, A=157), MT= 2 (Elastic scattering)
Eu-157 (Z= 63, A=157), MT= 4 (Inelastic scattering)
Gd-157 (Z= 64, A=157), MT=103 (n,p)
Gd-158 (Z= 64, A=158), MT= 28 (n,np)
Gd-158 (Z= 64, A=158), MT=104 (n,d)
Gd-160 (Z= 64, A=160), MT= 33 (n,nt)
Tb-159 (Z= 65, A=159), MT=106 (n,3He)
Tb-160 (Z= 65, A=160), MT=107 (n,α)
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-157 U-235 Thermal 6.339900e-07 4.057540e-07
Eu-157 U-235 Fast 4.730240e-07 3.027350e-07
Eu-157 U-235 High 6.134410e-05 3.926030e-05
Eu-157 U-238 Fast 1.960730e-07 1.254870e-07
Eu-157 U-238 High 5.425900e-06 3.472580e-06
Eu-157 Pu-239 Thermal 3.457460e-05 2.212770e-05
Eu-157 Pu-239 Fast 6.352970e-05 4.065900e-05
Eu-157 Pu-239 High 3.992190e-04 2.555000e-04
Eu-157 Pu-241 Thermal 4.230690e-06 2.707640e-06
Eu-157 Pu-241 Fast 1.413940e-05 9.049190e-06
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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-157 U-235 Thermal 6.141370e-05 4.920330e-06
Eu-157 U-235 Fast 1.056070e-04 3.386600e-05
Eu-157 U-235 High 3.754950e-04 8.623740e-05
Eu-157 U-238 Fast 4.139020e-04 1.324010e-04
Eu-157 U-238 High 8.043500e-04 1.285590e-04
Eu-157 Pu-239 Thermal 7.411060e-04 4.447350e-05
Eu-157 Pu-239 Fast 1.060510e-03 8.485300e-05
Eu-157 Pu-239 High 1.093530e-03 1.748520e-04
Eu-157 Pu-241 Thermal 1.353900e-03 5.414800e-05
Eu-157 Pu-241 Fast 1.627090e-03 5.210600e-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