element
Information about Radon-205:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:204.991668±0.000122amu #
    Excess Mass (Δ):-7.761000±0.114000MeV #
    Binding Energy:1595.100000±0.114000MeV #
    β- Decay Energy:-6.517000±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: 5/2-
  • Half life: 2.8 min ( 168 sec., λ = 0.00412588 s-1)
  • Mode of decay:
    E.C.
    to
    205
    85
    At
      (Q = 5.240 MeV)   Branch ratio: 77.00 %
  • Mode of decay:
    α
    to
    201
    84
    Po
      (Q = 6.390 MeV)   Branch ratio: 23.00 %

  • Possible parent nuclides:
    α from
    209
    88
    Ra
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
02.83 m5/2- +0.802(9) [209Rn]CFBLSHFI 34 25 (87)
+0.062(6) CFBLSCERN EP/87 51 (87)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.