194BI 198AT A DECAY (1.25 S) 2019GH11,1992HU04,2005UU0221NDS 202109
194BI H TYP=FUL$AUT=Jun Chen and Balraj Singh$CIT=NDS 177, 1 (2021)$
194BI2 H CUT=3-Sep-2021$
194BI c 2019Gh11: {+198}At from |a decay of {+202}Fr, which was produced in
194BI2c U(p,X),E=1.4 GeV at ISOLDE-CERN facility using UC{-x} target and pulsed
194BI3c proton beam. Francium atoms were ionized and accelerated to 30 keV,
194BI4c followed by mass separation using High-Resolution separator (HRS).
194BI5c Measured E|a, I|a, |a|g-coin using Si surface barrier detectors for |a
194BI6c particles and two single-crystal HPGe detectors for |g detection.
194BI7c FWHM|?33 keV for E|a=5-8 MeV range. The two activities of {+202}Fr
194BI8c could not be separated in this work.
194BI c 1992Hu04: online mass-separated source from {+202}Fr |a decay produced
194BI2c in Ir({+20}Ne,xn){+202}Fr and {+181}Ta({+32}S,2p9n){+202}Fr, and
194BI3c directly in Re({+20}Ne,xn){+198}At. Measured |a particles, |g rays,
194BI4c conversion electrons, |a|g(t) coin using Ge and Si(Li) detectors.
194BI c 2005Uu02, 2005Uu03: {+198}At produced in |a decay of {+202}Fr produced
194BI2c in {+141}Pr({+63}Cu,pn),E=278-288 MeV and in {+170}Yb({+36}Ar,p3n),
194BI3c E=180-185 MeV
194BI c 2014Ka23: {+198}At source from {+202}Fr |a decay, which was produced in
194BI2c {+149}Sm({+56}Fe,p2n), E({+56}Fe)=244-275 MeV reaction, with
194BI2c beam from GSI accelerator facility. Target=370 |mg/cm{+2} thick
194BI3c enriched to 96.9% in {+149}Sm, and backed with 40 |mg/cm{+2} thick
194BI4c carbon backing and covered with a 10 |mg/cm{+2} layer of carbon. It
194BI5c was mounted on a rotating wheel. Evaporation residues were separated
194BI6c using SHIP facility at GSI, and implanted into the detection system
194BI7c consisting of 16-strip position sensitive Si detectors (PSSD),
194BI8c a pack of six Si strip detectors (BOX) at the back to detect escaping
194BI9c |a particles, and three time-of-flight detectors in front of PSSDs.
194BIAc Measured position and time correlations between evaporation residues
194BIBc (Er) and |a events, E|a, half-lives of ground states and isomers of
194BICc {+202}Fr and {+198}At, Er-|a-|a correlations. Comparison with previous
194BIDc experimental results. (ER)|a|a correlated events were assigned to
194BIEc {+202}Fr -> {+198}At -> {+194}Bi decay chain
194BI c Others:
194BI c 1998Bo14: measured |a-decay branching ratios.
194BI c 1996En01: online mass separated (gas-filled recoil separator) source
194BI2c from {+202}Fr |a decay produced in {+170}Yb({+35}Cl,3n), E=171-186 MeV.
194BI3c Measured |a particles using semiconductor detector.
194BI c 1988Wo11: measured |a anisotropy
194BI c 1967Tr06: measured E|a, T{-1/2}
194BI cA E,IA$From 2019Gh11, unless otherwise stated
194BI cA HF$The nuclear radius parameter r{-0}({+194}Bi)=1.5187 {I42}
194BI2cA (2020Si16) deduced from interpolation (or unweighted average) of radius
194BI3cA parameters of the adjacent even-even nuclides, as given in 2020Si16:
194BI4cA {+192}Pb, {+194}Pb, {+194}Po, and {+196}Po.
194BI cG $Intensities from |a|g-coin data are given under comments, and are
194BI2cG relative to 100 for I(6358|a-218.2|g-coin) in the decay of (3+)
194BI3cG g.s. of {+218}At (2019Gh11)
194BI cG E$From 2019Gh11
194BI cG E(y)$Unplaced |g observed in coincidence with 6338|a from the
194BI2cG decay of (10-) isomer of {+198}At (2019Gh11).
194BI cL E$From E|g values, keeping energy of the 161 level as fixed
194BI2cL without its uncertainty. Absolute uncertainty in each level energy
194BI3cL is 8 keV, same as in the 161-keV level
194BI cL J$From the Adopted Levels
198AT P 265 3 (10-) 1.25 S 6 6889.4 19
198AT cP E$Deduced by 2019Gh11 from |a-decay data in their work. Other: 287
198AT2cP {I12} deduced by 2013St25 from analysis of measured mass excesses and
198AT3cP linkage through |a-decay chains.
198AT cP J$From {+198}At Adopted Levels in the ENSDF database (Dec 2015 update)
198AT cP T$weighted average of 1.28 s {I10} (2019Gh11), 1.24 s {I6} (2014Ka23),
198AT2cP 1.04 s {I15} (2005Uu02), 1.3 s {I+8-3} (1996En01), 1.0 s {I2}
198AT3cP (1992Hu04), and 1.5 s {I3} (1967Tr06).
198AT4cP Half-life of 1.21 s {I6} in {+198}At Adopted Levels in the
198AT5cP ENSDF database (Dec 2015 update) is revised here with the inclusion of
198AT6cP 2019Gh11 measurement
198AT cP QP$From 2021Wa16
194BI N 0.93 7
194BI cN BR$From %|a|>86 (1995BiZZ). Others: %|a=76 {I21} (1998Bo14),
194BI2cN >67 (1992Hu04), 26 {I7} (1980Ew03).
194BI G 258.8 1 y
194BI cG $I(6338|a-258.8|g-coin)=24 {I4}
194BI G 336.3 5 y
194BI cG $I(6338|a-336.3|g-coin)=15 {I3}
194BI G 363.6 2 y
194BI cG $I(6338|a-363.6|g-coin)=12 {I3}
194BI L 161 8 (10-)
194BI cL E$deduced by 2019Gh11 from |a-decay data in their work. Other:
194BI2cL 184 {I12} in 2013St25.
194BI A 6852 4 99.70 14 1.8 2
194BI cA E$weighted average of 6849 {I5} (2014Ka23), 6850 {I6} (2005Uu02),
194BI2cA 6855 {I4} (1996En01), 6856 {I4} (1992Hu04), 6853 {I10} (1980Ew03)
194BI3cA and 6847 {I5} (1967Tr06). Other: 6856 (1995BiZZ).
194BI cA IA$Relative I|a=100 (2019Gh11)
194BI cA $Reduced |a width |d{-|a}{+2}=26 keV {I1} (2019Gh11), 39 keV
194BI2cA {I3} (2014Ka23)
194BI L 265.5 2 (9-)
194BI A 6753 8 0.19 14 4.0E2 30
194BI cA IA$0.05 to 0.34 in 2019Gh11
194BI cA $Reduced |a width |d{-|a}{+2}=0.04 to 0.28 (2019Gh11)
194BI G 104.5 2 M1+E2 7.3 17
194BI cG $I(6753|a-104.5|g-coin)=21 {I3}
194BI cG M$from the Adopted Gammas
194BI L 686.4 2 (11-)
194BI A 6338 8 0.11 2 17 4
194BI cA IA$0.09 to 0.13 in 2019Gh11
194BI cA $Reduced |a width |d{-|a}{+2}=3.3 to 4.8 (2019Gh11)
194BI G 525.4 2 M1 0.1024
194BI cG $I(6338|a-525.4|g-coin)=5 {I2}
194BI cG M$from the Adopted Gammas
194BI L 699.2 4 (10-)
194BI A 6322 12 0.005 3 3.3E2 20
194BI cA $Reduced |a width |d{-|a}{+2}=0.2 {I1} (2019Gh11)
194BI G 538.3 4
194BI cG $I(6322|a-538.4|g-coin)=2.8 {I14}