element
Information about Iridium-191:

WikipediaNeutron Cross SectionsX-Ray TransitionsX-Ray Attenuation

    Mass-Energy Data:

    Atomic Mass:190.960591±0.000003amu
    Excess Mass (Δ):-36.709063±0.002870MeV
    Binding Energy:1518.090508±0.002882MeV
    β- Decay Energy:-1.018553±0.003508MeV
"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:

  • Atomic Percent Abundance: 37.3%
  • Spin: 3/2+
  • Stable Isotope
    Meta state at 0.171 Mev
  • Spin: 11/2-
  • Half life: 4.94 s ( 4.94 sec., λ = 0.140313 s-1)
  • Mode of decay: γ (IT)  (Q = 0.171 MeV)
    Meta state at 2.047 Mev 4.94
  • Half life: 5.5 s ( 5.5 sec., λ = 0.126027 s-1)
  • Mode of decay: γ (IT)  (Q = 2.047 MeV)

  • Possible parent nuclides:
    β- from
    191
    76
    Os
    E.C. from
    191
    78
    Pt
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
0stable3/2+ +0.1507(6) AB/DPL 140B 17 (84)
+0.1461(6) NPR 165 506 (68)/PR 175 696 (68)
+0.816(9) a "Mu-X, O"PR C29 1830 (84)/PR 87 1048 (52)
+0.8(2) st ABZP A286 333 (78)
823.8 ns1/2+ +0.600(6) [191Ir]"ME, R"HFI 13 149 (83)
129123 ps5/2+ +0.86(6) [198Pt 407]TFHFI 97/98 479 (96)
+0.45(2) "IMPAC, TF, R"NP A456 349 (86)
+0.48(4) "IPAD, ME"IzF 44 1778 (80)
1714.9 s11/2- 6.03(4) NMR/ONPL 36B 328 (71)/PR C9 2063 (74)
sign positive NO/CPZP A340 235 (91)
sign positive NMR/ON(b)PR C54 1129
17939 ps3/2+ +1.4(4) IPACIzUz 1973n4 79 (73)
34320 ps7/2+ +1.35(11) [198Pt 407]TFHFI 97/98 479 (96)
+1.7(3) [191Ir 129]"TF, IMPAC"NP A456 349 (86)
5039.6 ps9/2+ +2.4(2) [198Pt 407]TFHFI 97/98 479 (96)
+3.1(11) [191Ir 129]TFNP A456 349 (86)
6862.7 ps7/2+ +0.8(3) [198Pt 407]TFHFI 97/98 479 (96)
+0.5(7) [191Ir 129]TFNP A456 349 (86)
8322.8 ps11/2+ +3.4(9) [198Pt 407]TFHFI 97/98 479 (96)
N. J. Stone, Table of Nuclear Magnetic Dipole and Electric Quadrupole Moments, to be published.  2000 Courtesy of T. Burrows at BNL/NNDC.