201
84
Po
element 		Information about Polonium-201:

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

    Atomic Mass:200.982209±0.000110amu #
    Excess Mass (Δ):-16.572000±0.102000MeV #
    Binding Energy:1573.191000±0.102000MeV #
    β- Decay Energy:-5.848000±0.263000MeV #
"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:

  • Spin: 3/2-
  • Half life: 15.3 min ( 918 sec., λ = 0.000755062 s-1)
  • Mode of decay:
    E.C.
     to
    201
    83
    Bi
       (Q = 4.880 MeV)   Branch ratio: 98.40 %
  • Mode of decay:
    α
     to
    197
    82
    Pb
       (Q = 5.799 MeV)   Branch ratio: 1.60 %
    Meta state at 0.424 Mev
  • Spin: 13/2+ 15.3
  • Half life: 8.9 min ( 534 sec., λ = 0.00129803 s-1)
  • Mode of decay: γ (IT)  (Q = 0.424 MeV)   Branch ratio: 56.00 %
  • Mode of decay:
    E.C.
     to
    201
    83
    Bi
       (Q = 5.304 MeV)   Branch ratio: 41.00 %
  • Mode of decay:
    α
     to
    197
    82
    Pb
       (Q = 6.223 MeV)   Branch ratio: ~2.90 %

  • Possible parent nuclides:
    E.C. from
    201
    85
    At
    α from
    205
    86
    Rn
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)
Magnetic Dipole Moments and Electric Quadrupole Moments
Ex(kev)T1/2Spin    m(nm)    Q(b)    Ref. Std.MethodReference
015.3 m3/2- 0.94(8) NO/SJP G17 1673 (91)
4258.9 m13/2+ 1.00(7) NO/SJP G17 1673 (91)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.