190BI 194AT A DECAY (286 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 MeV
190BI2c 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.
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 2013Uu01: {+194}At activity from {+198}Fr |a decay, the latter produced
190BI2c {+141}Pr({+60}Ni,3n),E=268 MeV reaction at JYFL, Jyvaskyla accelerator
190BI3c facility followed by separation using RITU separator. Measured E|a,
190BI4c I|a, |a|a-correlations, T{-1/2} of {+194}At activity.
190BI c 1995Le15: {+194}At Activity produced in {+141}Pr({+56}Fe,3n),E=256 MeV
190BI2c reaction and separated in a gas-filled recoil mass separator.
190BI3c The measured fine structure of |a particles was not definite due to
190BI2c possible |a-conversion electron summing in the detector.
190BI c 1984YaZY: a 0.18 s {I8} |a activity with E|a=7200 keV {I20} was
190BI2c produced in heavy-ion reactions and assigned to {+194}At by mass
190BI3c separation and |a|a(t) correlation with daughter nuclei
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 45-keV level kept
190BI2cL as fixed. Absolute uncertainty is 15 keV, as for the 45-keV level
190BI cL J$From the Adopted Levels
194AT P 0+X (4-,5-) 286 MS 7 7454 11
194AT cP E$x=0 assumed in 2017Au03
194AT cP J$favored |a decay to (5-) isomer in {+190}Bi.
194AT cP T$Measured by 2013An03 (supersedes 253 ms {I10} in 2009An11). Others:
194AT2cP 240 ms {I+40-30} (2013Ny01), 320 ms {I+230-90} and 280 ms {I+200-90}
194AT3cP (2013Uu01), |?250 ms (1995Le15), 0.18 s {I8} (1984YaZY)
194AT cP QP$From 2017Wa10
190BI N 1 AP
190BI G 15 AP
190BI G 29.0 5
190BI G 34.9 5
190BI G 68.7 5
190BI G 99.3 5
190BI G 107.7 5
190BI G 122.6 5
190BI G 131.6 5
190BI G 134.4 5
190BI G 148.8 5
190BI L 0 (3+)
190BI cL E$(3+) determined to be g.s. by 2020St11. See Adopted Levels
190BI cL J$2013Ny01 suggest that J|p could also be (2-) connecting 121 and g.s.
190BI2cL through 76.5, E1 transition from 121, 3+ |) 0.0, 2- with a possible
190BI3cL configuration=|p3s{-1/2}{+-1}~#|n3p{-3/2}
190BI A 7310 15 1.5 LT 1420 GT
190BI cA IA$ |<1.0 {I5}
190BI cA $Reduced |a-decay width |d{+2}{-|a}|<0.06 keV {I2} (2009An11)
190BI cA $Hindrance factor |>200 {I100}, relative to 1.0 for 7190|a (2009An11)
190BI L 45 15 (4+)
190BI A 7266 15 7 3 24E1 11
190BI cA $Reduced |a-decay width |d{+2}{-|a}=0.6 keV {I3} (2009An11)
190BI cA $Hindrance factor=20 {I10}, relative to 1.0 for 7190|a (2009An11)
190BI G 45 15 [M1] S
190BI cG E$not observed, |g probably totally converted (2009An11); not reported
190BI2cG by 2013Ny01
190BI cG M$M1 is required from the intensity balance (2009An11)
190BI L 121.5 3 (5-) 175 NS 8 A
190BI cL T$measured by 2009An11
190BI A 7190 15 83 3 11.3 11
190BI cA E$from 2009An11. Others: 7174 {I8} (2013Ny01),
190BI2cA 7188 {I12} and 7189 {I12} (2013Uu01). Value from 2009An11 is preferred
190BI3cA by evaluators due to higher statistics in this experiment, although,
190BI4cA energy precision is somewhat lower than in 2013Ny01 and 2013Uu01.
190BI cA $Reduced |a-decay width |d{+2}{-|a}=12 keV {I1} (2009An11)
190BI G 76.5 3 E1 0.194 4
190BI cG E$weighted average of 76.0 {I5} (2009An11) and 76.7 keV {I3} (2013Ny01)
190BI cG M$from |a(total)exp=0.4 {I1} in 2009An11
190BI L 168.0 5 (6+) A
190BI A 7145 15 9 3 73 26
190BI cA $Reduced |a-decay width |d{+2}{-|a}=2.0 keV {I7} (2009An11)
190BI cA $Hindrance factor=6 {I2}, relative to 1.0 for 7190|a (2009An11)
190BI G 46.5 5 (E1) 0.744 25
190BI cG E$|g from 2009An11, not reported by 2013Ny01
190BI cG M$from intensity balance arguments (2009An11)