209HG 9BE(238U,X):T1/2:XUNDL-1 2016CA25,2017CA12 201708 209HG c Compiled (unevaluated) data set from 2016Ca25: 209HG2c Phys Rev Lett 117, 012501 (2016); and 2017Ca12: 209HG3c Phys Rev C 95, 064322 (2017). 209HG c Compiled by B. Singh (McMaster); June 29, 2016 209HG c Updated by B. Singh, August 14, 2017 to include 2017Ca12. 209HG c {+209}Hg produced by fragmentation of E=1 GeV/nucleon {+238}U beam 209HG2c from SIS-18 synchrotron at GSI on a {+9}Be target of thickness 209HG3c 1.6 g/cm{+2}. Reaction products were separated and identified by GSI 209HG4c Fragment Separator (FRS) using B|r-|DE-B|r technique. The FRS 209HG5c tracking detectors were four time-projection chambers (TPCs), two 209HG6c ionization chambers, and thin plastic scintillators for tof 209HG7c measurement. Mass-over-charge (A/Q) ratios were measured for ions 209HG8c analyzed on an event-by-event basis. Finally selected ions of 209HG9c interest were implanted into a stack of double-sided silicon strip 209HGAc detectors SIMBA, which also detected |b-decay events. 209HGBc Comparison with theoretical calculations using FRDM+QRPA, DF3+cQRPA 209HGCc KTUY and RHB+RQRPA models. (cQRPA=continuum quasi-random-phase 209HGDc approximation; FRDM=finite-range droplet model; DF3=density functional 209HGEc theory; RHB=relativistic Hartree-Bogoliubov; RQRPA=relativistic 209HGFc QRPA; KTUV=Koura-Tachibana-Uno-Yamada model). Relevance to 209HGGc r-process in nucleosynthesis. 209HG L 0 (9/2+) 6.3 S 11 209HG2 L %B-=100$%B-N=? 209HG cL J$from {+209}Hg Adopted Levels in the ENSDF database (Sep 2013 update) 209HG cL T$measured by 2017Ca12 and 2016Ca25 (rounded to 6 s {I1} in latter). 209HG2cL Method: (ion)|b correlated decay curve and 209HG3cL analyzed by maximum-likelihood method. Previous value of 36 s {I+7-4} 209HG4cL in {+209}Hg Adopted Levels in the ENSDF database (Sep 2013 update), 209HG5cL taken from 1998Zh22 (Phys. Rev. C58, 156; also 1998Zh19: Eur. Phys. 209HG6cL J. A54, 507) is in severe disagreement with the present measurement.