87-Fr-220
 basic

 element
87-francium-220

  • Atomic Mass: 220.0123130 +- 0.0000050 amu
  • Excess Mass: 11469.463 +- 4.623 keV
  • Binding Energy: 1696156.808 +- 4.632 keV
  • Beta Decay Energy: B- 1209.367 +- 10.663 keV
"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.
  • Spin: 1+
  • Half life: 27.4 s
  • Mode of decay: Alpha to At-216
    • Branch ratio: 99.65 %
    • Decay energy: 6.801 MeV
  • Mode of decay: Beta to Ra-220
    • Branch ratio: 0.35 %
    • Decay energy: 1.209 MeV

  • Possible parent nuclides:
    Alpha from Ac-224
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
027.4 s1+ -0.67(1) [211Fr]CFBLSEPL 3 175 (87)
-0.67(1) [211Fr]ABLSPL 163B 66 (85)
+0.47(3) st "ABLS, R"PL 163B 66 (85)/NP A468 1 (87)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.