93-Np-238
Spin
Level energy(keV) Spin & Parity
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ground state 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)
238.050946611 ± 0.000001942 (amu) [mass excess = 47456.463 ± 1.809 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
1291.516 ± 0.446 (keV)
Strong Gamma-rays from Decay of Np-238 (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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984.45 25.19 B-
1025.87 8.72 B-
1028.54 18.29 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- 2.117 D 2
Cross Sections (taken from JENDL-4.0)
Table of cross sections, Np-238.
Figures of cross sections, Np-238: 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
Np-237 (Z= 93, A=237), MT=102 (n,γ)
Np-238 (Z= 93, A=238), MT= 2 (Elastic scattering)
Np-238 (Z= 93, A=238), MT= 4 (Inelastic scattering)
Np-239 (Z= 93, A=239), MT= 16 (n,2n)