Nuclear Data Sheets for A = 184

Nuclear structure and decay data for all nuclei with mass number A=184 (Lu, Hf, Ta, W, Re, Os, Ir, Pt, Au, Hg, Tl, Pb, Bi) have been evaluated, and the corresponding level schemes from radioactive decay and reaction studies are presented. This evaluation supersedes the previous publication (R.B. Firestone, Nuclear Data Sheets 58, 243 (1989) (literature cutoff date 1 June 1989)) and subsequent revisions of high spin data for several nuclides by Huo Junde (31 July, 1995) and evaluations by C.M. Baglin for 184 Au, 184 Pb and the new nuclide 184 Bi (literature cutoff dates 4 April 2003, 28 July 2003 and 21 January 2004, respectively). The present evaluation includes literature available by 1 October 2009. Subsequent to those evaluations, (HI, xn γ ) studies have contributed significantly to our knowledge of the structure of 184 Re (2005Wh04), 184 Os (2002Sh21, 2002Wh01, 1998Sh36), 184 Hg (1995De30, 1995Sf01) and 184 Au (2004Zh38). Additional information on the level structure of 184 W has become available from new thermal neutron capture measurements (2003Bo52, 2004Lo22, 2007ChZX), from detailed (p,t) reaction studies (2006Me25), new Coulomb excitation (1991Wu05) and (γ,γ′) (1993He15) studies, and from the 198 Pt( 136 Xe,X γ ) reaction (2004Wh02); knowledge of 184 Pt has benefited from a new 184 Au ε decay study (2006KrZT, 1992Xu02, 1992Xu06, 1992XuZY), but this decay cannot yet be normalized due to the mixed parentage of the sources used.