31
12
Mg
element 		Information about Magnesium-31:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation
    Mass-Energy Data:

    Atomic Mass:30.996548±0.000081amu
    Excess Mass (Δ):-3.215089±0.075711MeV
    Binding Energy:244.037856±0.075711MeV
    β- Decay Energy:11.739092±0.078396MeV
"The 1995 update to the atomic mass evaluation" by G.Audi and A.H.Wapstra, Nuclear Physics A595 vol. 4 p.409-480, December 25, 1995.
Radioactive Decay Data:

  • Half life: 230 ms ( 0.23 sec., λ = 3.01368 s-1)
  • Mode of decay:
    β-
     to
    31
    13
    Al
       (Q = 11.740 MeV)
  • Mode of decay: β- +
    1
    0
    n to
    30
    13
    Al
       (Q = 4.590 MeV)   Branch ratio: 1.70 %

  • Possible parent nuclides:
    β- from
    31
    11
    Na
    β- +
    1
    0
    n from
    32
    11
    Na
    β- + 2
    1
    0
    n from
    33
    11
    Na
R.R.Kinsey, et al.,The NUDAT/PCNUDAT Program for Nuclear Data,paper submitted to the 9 th International Symposium of Capture-Gamma_raySpectroscopy and Related Topics, Budapest, Hungary, Octover 1996.Data extracted from NUDAT database (Jan. 14/1999)