190BI 194AT A DECAY (323 MS) 2009AN11,2013AN03 20NDS 202011
190BI H TYP=FUL$AUT=Balraj Singh,{+1} and Jun Chen{+2}$CIT=NDS 169, 1 (2020)$
190BI2 H CUT=15-Oct-2020$
190BI c 2009An11, 2013An03: {+194}At produced in {+141}Pr({+56}Fe,3n) E=259
190BI2c MeV reaction using UNILAC heavy ion accelerator at GSI facility.
190BI3c Evaporation residues were separated by the velocity filter SHIP,
190BI4c transported through three time-of-flight detectors and implanted into a
190BI5c 16-strip position-sensitive silicon detector (PSSD) for detection of
190BI6c subsequent |a and fission decays. The |g rays were detected with a
190BI7c large-volume clover Ge detector. Measured E|a, I|a, E|g, |a|g coin,
190BI8c (recoil)|a correlations, fission spectra, half-lives. Deduced upper
190BI9c limits on TKE, T{-1/2}, |b-delayed fission probability. See
190BIac 2001An11 for the identification of the parent state in {+194}At.
190BI c 2013Ny01: {+194}At produced in {+147}Sm({+51}V,4n),E=224 MeV reaction
190BI2c at JYFL, Jyvaskyla accelerator facility followed by separation using
190BI3c RITU separator. Measured E|a, I|a, E|g, |a|g-coin, T{-1/2} of {+194}At
190BI4c activities.
190BI c All data are from 2009An11, unless otherwise noted.
190BI cA HF$Deduced by evaluators using r{-0}({+190}Bi)=1.550 {I22}, obtained
190BI2cA from unweighted average of r{-0}=1.5137 {I13} for {+188}Pb,
190BI3cA 1.5113 {I39} for {+190}Pb, 1.590 {I11} for {+190}Po and 1.585 {I15}
190BI4cA for {+192}Po taken from 2020Si16 evaluation of r{-0} parameters.
190BI5cA Relative hindrance factors and reduced |a-decay widths from 2009An11
190BI6cA are given under comments.
190BI cL E(A)$From E|g data, relative to the energy of the 171-keV level kept
190BI2cL as fixed. Absolute uncertainty is 57 keV, as for the 171-keV level
190BI cL J$From the Adopted Levels
194AT P 0+Y (9-,10-) 323 MS 7 7454 11
194AT cP E$y=46 {I60} Deduced by evaluators from Q(|a)=7454 {I11} for {+194}At
194AT2cP decay, and measured E|a=7178 {I15} to the 171 {I62}, (10-) state in
194AT3cP {+190}Bi. Other: -20 keV {I40} (2017Au03) from |a-energy difference.
194AT cP J$proposed by 2009An11 based on favored |a decay to (10-) isomer in
194AT2cP {+190}Bi and a configuration=|p(7/2-[514])~#|n(1i{-13/2})
194AT cP T$Measured by 2013An03 (supersedes 310 ms {I8} in 2009An11). Other:
194AT2cP 300 ms {I+50-40} (2013Ny01)
194AT cP QP$From 2017Wa10
190BI N 1 AP
190BI cN BR$%|a|?100 for {+194}At decay (323 ms)
190BI G 15 AP
190BI G 29.0 5
190BI G 34.9 5
190BI G 68.7 5
190BI G 99.3 5
190BI G 107.7 5
190BI G 122.6 5
190BI G 131.6 5
190BI G 134.4 5
190BI G 148.8 5
190BI L 191 65 (10-)
190BI dL E$level energy held fixed in least-squares adjustment
190BI cL E$from the Adopted Levels
190BI A 7178 15 78 5 12.4 13
190BI cA E$from 2009An11. Other: 7156 {I5} (2013Ny01). Value from 2009An11 is
190BI2cA preferred by evaluators due to higher statistics in this experiment,
190BI3cA although, energy precision is lower than in 2013Ny01.
190BI cA $Reduced |a-decay width |d{+2}{-|a}=10.0 keV {I14} (2009An11).
190BI L 231.3 5 (9+,10+,11+) A
190BI A 7135 15 8 2 86 23
190BI cA $Reduced |a-decay width |d{+2}{-|a}=1.5 keV {I4} (2009An11)
190BI cA $Hindrance factor=6.7 {I20}, relative to 1.0 for 7178|a (2009An11)
190BI G 40.3 5 (E1) 1.09 4
190BI cG M$from intensity balance arguments (2009An11)
190BI L 287.7 5 (9-,10-,11-) A
190BI A 7087 15 13 2 36 7
190BI cA E$ 7085 in Fig. 7 of 2009An11
190BI cA $Reduced |a-decay width |d{+2}{-|a}=3.5 keV {I7} (2009An11)
190BI cA $Hindrance factor=2.9 {I6}, relative to 1.0 for 7178|a (2009An11)
190BI G 96.7 5 (M1) 11.2 2
190BI cG M$from intensity balance arguments (2009An11)
190BI L 465.0 5 (-) 1.0 US +10-5 A
190BI cL T$measured by 2009An11. Other: 0.50 |ms {I10} from decay loss of
190BI2cL {+190}Bi nuclei during the flight through the velocity filter SHIP
190BI3cL at GSI (2001An11), assuming that the isomer decays 100% to the
190BI4cL (10-) level
190BI A 6908 15 1.0 3 111 35
190BI cA $Reduced |a-decay width |d{+2}{-|a}=1.1 keV {I4} (2009An11)
190BI cA $Hindrance factor=9 {I3}, relative to 1.0 for 7178|a (2009An11)
190BI G 274.0 5 (E2+M1) 0.38 22
190BI cG E$from text of 2009An11. Other: 273 {I1} (2001An11)
190BI cG M$from |a(K)exp=0.20 {I5} determined from (|g)(K x-ray)-coin
190BI2cG (2001An11) gives E2 or M1+E2 with |d|?1.5.