2-He-4
Spin
Level energy(keV) Spin & Parity
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ground state 0+
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)
4.00260325413 ± 0.00000000006 (amu) [mass excess = 2424.91561 ± 0.00006 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-22898.270 ± 212.132 (keV)
Cross Sections (taken from JENDL-4.0)
Table of cross sections, He-4.
Figures of cross sections, He-4: type-1: type-2.
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
He- 3 (Z= 2, A= 3), MT=102 (n,γ)
He- 4 (Z= 2, A= 4), MT= 2 (Elastic scattering)
Li- 6 (Z= 3, A= 6), MT=105 (n,t)
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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He- 4 U-235 Thermal 1.947790e-03 1.246590e-04
He- 4 U-235 Fast 1.715100e-03 1.097660e-04
He- 4 U-235 High 1.333230e-03 8.532700e-05
He- 4 U-238 Fast 1.526390e-03 9.768870e-05
He- 4 U-238 High 1.151910e-03 7.372250e-05
He- 4 Pu-239 Thermal 2.129900e-03 1.363140e-04
He- 4 Pu-239 Fast 1.915550e-03 1.225950e-04
He- 4 Pu-239 High 2.344150e-03 1.500260e-04
He- 4 Pu-241 Thermal 2.081290e-03 1.332030e-04
He- 4 Pu-241 Fast 2.014440e-03 1.289240e-04
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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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He- 4 U-235 Thermal 1.999630e-03 1.248460e-04
He- 4 U-235 Fast 1.761770e-03 1.099330e-04
He- 4 U-235 High 1.369460e-03 8.545650e-05
He- 4 U-238 Fast 1.567940e-03 9.783710e-05
He- 4 U-238 High 1.183290e-03 7.383450e-05
He- 4 Pu-239 Thermal 2.187890e-03 1.365210e-04
He- 4 Pu-239 Fast 1.967720e-03 1.227810e-04
He- 4 Pu-239 High 2.407960e-03 1.502540e-04
He- 4 Pu-241 Thermal 2.137940e-03 1.334050e-04
He- 4 Pu-241 Fast 2.069230e-03 1.291200e-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