99-Es-251
Spin
Level energy(keV) Spin & Parity
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ground state (3/2-)
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)
251.079993586 ± 0.000006715 (amu) [mass excess = 74513.546 ± 6.256 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
-1440.373 ± 16.440 (keV)
Strong Gamma-rays from Decay of Es-251 (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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129.8 0.84 EC
152.8 0.53 EC
177.6 1.29 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
A 33 H 1
EC 33 H 1
Cross Sections (taken from JENDL-4.0)
Table of cross sections, Es-251.
Figures of cross sections, Es-251: 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
Es-251 (Z= 99, A=251), MT= 2 (Elastic scattering)
Es-251 (Z= 99, A=251), MT= 4 (Inelastic scattering)
Es-252 (Z= 99, A=252), MT= 16 (n,2n)
Es-253 (Z= 99, A=253), MT= 17 (n,3n)
Es-254 (Z= 99, A=254), MT= 37 (n,4n)
Es-254 (Z= 99, A=254), MT= 37 (n,4n)