Level energy(keV)   Spin & Parity       
       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)
     203.973493981 ± 0.000000527 (amu)  [mass excess = -24690.197 ± 0.491 (keV) ]
Beta-decay energy (calculated as M(A,Z)-M(A,Z+1), taken from Ame2012)
     -344.578 ± 1.282 (keV) 
Cross Sections (taken from JENDL-4.0)
     Table of cross sections, Hg-204.
     Figures of cross sections, Hg-204:  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
     Hg-204 (Z= 80, A=204), MT=  2 (Elastic scattering)
     Hg-204 (Z= 80, A=204), MT=  4 (Inelastic scattering)
     Pb-207 (Z= 82, A=207), MT=107 (n,α)
     Pb-208 (Z= 82, A=208), MT= 22 (n,nα)