34-Se-81
Spin
Level energy(keV) Spin & Parity
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ground state 1/2-
1.03000E+02 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)
80.917993023 ± 0.000001357 (amu) [mass excess = -76389.007 ± 1.264 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
1586.644 ± 1.700 (keV)
Strong Gamma-rays from Decay of Se- 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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275.93 0.68 B-
290.04 0.56 B-
828.27 0.29 B-
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103.01 12.79 IT
201. 3.E-03 B-
260.10 0.05 B-
275.93 0.05 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- 18.45 M 12
B- 57.28 M 2
IT 57.28 M 2
Evaluated Data Libraries
Links to the libraries.
Parent Nuclides by Reactions in JENDL-4.0
Se- 80 (Z= 34, A= 80), MT=102 (n,γ)
Se- 82 (Z= 34, A= 82), MT= 16 (n,2n)
Br- 81 (Z= 35, A= 81), MT=103 (n,p)
Kr- 83 (Z= 36, A= 83), MT=106 (n,3He)
Kr- 84 (Z= 36, A= 84), MT=107 (n,α)
Kr- 85 (Z= 36, A= 85), MT= 22 (n,nα)
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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Se- 81 U-235 Thermal 1.057660e-05 2.432610e-06
Se- 81 U-235 Fast 5.162470e-06 3.303980e-06
Se- 81 U-235 High 1.369390e-05 8.764110e-06
Se- 81 U-238 Fast 3.474040e-07 2.223380e-07
Se- 81 U-238 High 5.318020e-06 3.403540e-06
Se- 81 Pu-239 Thermal 3.231520e-05 2.068180e-05
Se- 81 Pu-239 Fast 1.411290e-05 9.032260e-06
Se- 81 Pu-239 High 1.905680e-05 1.219630e-05
Se- 81 Pu-241 Thermal 4.416320e-06 2.826440e-06
Se- 81 Pu-241 Fast 2.773270e-06 1.774900e-06
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Se- 81m U-235 Thermal 6.894680e-05 1.585780e-05
Se- 81m U-235 Fast 3.858720e-05 2.469580e-05
Se- 81m U-235 High 1.641490e-04 1.050560e-04
Se- 81m U-238 Fast 2.596700e-06 1.661880e-06
Se- 81m U-238 High 6.374720e-05 4.079820e-05
Se- 81m Pu-239 Thermal 2.106560e-04 1.348200e-04
Se- 81m Pu-239 Fast 1.054880e-04 6.751210e-05
Se- 81m Pu-239 High 2.284340e-04 1.461980e-04
Se- 81m Pu-241 Thermal 2.878910e-05 1.842500e-05
Se- 81m Pu-241 Fast 2.072910e-05 1.326660e-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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Se- 81 U-235 Thermal 1.900440e-03 1.588270e-04
Se- 81 U-235 Fast 2.145160e-03 5.413790e-04
Se- 81 U-235 High 3.293060e-03 5.584330e-04
Se- 81 U-238 Fast 7.954640e-04 2.837950e-04
Se- 81 U-238 High 3.149690e-03 5.622100e-04
Se- 81 Pu-239 Thermal 1.763150e-03 3.020550e-04
Se- 81 Pu-239 Fast 1.351640e-03 3.326550e-04
Se- 81 Pu-239 High 2.611870e-03 8.740030e-04
Se- 81 Pu-241 Thermal 5.821490e-04 2.025710e-04
Se- 81 Pu-241 Fast 8.652420e-04 2.203250e-04
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Se- 81m U-235 Thermal 2.310190e-04 5.313450e-05
Se- 81m U-235 Fast 2.256230e-04 1.443990e-04
Se- 81m U-235 High 4.414240e-04 2.825130e-04
Se- 81m U-238 Fast 7.313430e-05 4.680580e-05
Se- 81m U-238 High 3.379380e-04 2.162810e-04
Se- 81m Pu-239 Thermal 3.459680e-04 1.910050e-04
Se- 81m Pu-239 Fast 2.151480e-04 1.287690e-04
Se- 81m Pu-239 High 4.388830e-04 2.563150e-04
Se- 81m Pu-241 Thermal 7.764850e-05 4.969510e-05
Se- 81m Pu-241 Fast 9.564820e-05 6.121490e-05
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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