187
81
Tl
element 		Information about Thallium-187:

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

    Atomic Mass:186.976170±0.000430amu #
    Excess Mass (Δ):-22.197000±0.401000MeV #
    Binding Energy:1468.164000±0.401000MeV #
    β- Decay Energy:-7.322000±0.499000MeV #
"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: (1/2+)
  • Half life: 51 s ( 51 sec., λ = 0.0135911 s-1)
  • Mode of decay:
    E.C.
     to
    187
    80
    Hg
       (Q = 5.900 MeV)   Branch ratio: <100.00 %
  • Mode of decay:
    α
     to
    183
    79
    Au
       (Q = 5.539 MeV)   Branch ratio: >0.0 %
    Meta state at 0.335 Mev
  • Spin: (9/2-) 51
  • Half life: 15.60 s ( 15.6 sec., λ = 0.0444325 s-1)
  • Mode of decay:
    E.C.
     to
    187
    80
    Hg
       (Q = 6.235 MeV)   Branch ratio: <100.00 %
  • Mode of decay: γ (IT)  (Q = 0.335 MeV)   Branch ratio: <100.00 %
  • Mode of decay:
    α
     to
    183
    79
    Au
       (Q = 5.874 MeV)   Branch ratio: >0.0 %

  • Possible parent nuclides:
    E.C. from
    187
    82
    Pb
    α from
    191
    83
    Bi
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
051 s(1/2+) 1.55(6) [205Tl]CFBLSIoPconf132 221 (93)
33515.6 s(9/2-) (+)3.79(2) [205Tl]CFBLSIoPconf132 221 (93)
-2.43(5) CFBLSIoPconf132 221 (93)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.