204PB 204PB IT DECAY (66.93 M) 1956He50,1971Ha39,1972Si2210NDS 201002
204PB H TYP=FUL$AUT=C.J. CHIARA and F.G. KONDEV$CIT=NDS 111,141 (2010)$
204PB2 H CUT=1-Oct-2009$
204PB c 1956He50: isomer produced via metallic Tl bombarded with 25-MeV d's or
204PB2c by |e decay of {+204}Bi from Pb bombarded with 50-MeV p's;
204PB3c permanent-magnet and double-focusing |b spectrometers for
204PB4c E(ce), Ice(K), ce(t) measurements.
204PB c 1971Ha39: isomer produced via decay of {+204}Bi from {+206}Pb(d,4n),
204PB2c and by Tl(d,xn); Ge(Li) for |g's, FWHM=1.8 keV at 661 keV; cooled
204PB3c Si(Au) detector for ce's, FWHM=1.8 keV at 624 keV; measured E|g, I|g,
204PB4c Ice; deduced |a(K)exp.
204PB c 1972Si22: {+205}Tl(p,2n) reaction; 99.99%-pure natural Tl target;
204PB2c E(p)=14 MeV; Ge(Li) detector; spectra recorded in |?1-h intervals;
204PB3c measured E|g, I|g(t).
204PB DG CC$ FROM BrIcc v2.2 (31-Mar-2008) 2008KiAA, "Frozen Orbitals" appr.
204PB cG E$From 1970CrZY, except as noted
204PB cG RI$From relative intensities deduced from Ice(K) of 1956He50 and
204PB2cG |a(K)exp from BrIcc, unless otherwise stated. The absolute intensities
204PB3cG per 100 decays were obtained using the GABS program, unless othewise
204PBxcG stated
204PB cG M$From ce data of 1971Ha39, except as noted.
204PB cL E$From a least-squares fit to E|g, unless otherwise specified
204PB cL J$From |g mult assignments, based on |a(K)exp and K/L ratios.
204PB P 2185.88 8 9- 66.93 M 10
204PB N 1.0 1.0
204PB L 0 0+
204PB L 899.15 3 2+
204PB G 899.15 3 99.174 12E2 0.00821
204PBS G KC=0.00647 9$LC=0.001323 19$MC=0.000317 5$NC+=9.73E-5 14
204PBS G NC=8.02E-5 12$OC=1.562E-5 22$PC=1.473E-6 21
204PB cG E$From adopted gammas. E|g=899.15 keV {I10} in 1970CrZY
204PB cG RI$100 {I15} (relative intensity)
204PB cG M$|a(K)exp=0.0065 {I4}, K/L=4.9 {I3} (1971Ha39).
204PB L 1273.99 7 4+ 265 NS 6
204PB cL T$Weighted average of 258 ns {I12} (1963Sa19), 280 ns {I12}
204PB2cL (1967Li12), 260 ns 10 (1978So02).
204PB cL $Q=0.68 {I15} from |g|g(t) of {+204}Pb implanted in crystal, TDPAC
204PB2cL method (1974He16).
204PB cL $|m=+0.224 {I6} from weighted average of +0.216 {I20} (1955Kr06) by
204PB2cL angular correlation attenuation, +0.226 {I8} (1963Sa19) and +0.220
204PB3cL {I12} (1967Li12) by differential angular correlation method.
204PB G 374.76 7 94.20 14E2 0.0614
204PB cG E$From adopted gammas. E|g=374.74 keV {I10} in 1970CrZY
204PB cG RI$From intensity balances using I|g(889.15|g)=99.174% {I12} and
204PB2cG I|g(663.43|g)=0.0022% {I22}
204PBS G KC=0.0390 6$LC=0.01681 24$MC=0.00426 6$NC+=0.001291 19
204PBS G NC=0.001077 16$OC=0.000200 3$PC=1.370E-5 20
204PB cG M$|a(K)exp=0.0386 {I13}, K/L=2.25 {I5} (1971Ha39).
204PB G 1274 0.012 3[E4] 0.01771
204PBS G KC=0.01288 18$LC=0.00365 6$MC=0.000905 13$NC+=0.000279 4
204PBS G NC=0.000230 4$OC=4.45E-5 7$PC=4.08E-6 6
204PB cG E$From 1972Si22.
204PB cG RI$0.012 {I2} (relative intensity), branching ratio from 1972Si22;
204PB2cG however, 1988ZhZT report I|g=0.046 {I3}.
204PB L 1563.41 12 4+
204PB G 289.30 15 0.25 5 M1+E2 +0.09 2 0.469
204PBS G KC=0.383 6$LC=0.0656 10$MC=0.01538 22$NC+=0.00477 7
204PBS G NC=0.00391 6$OC=0.000779 11$PC=8.31E-5 12
204PB cG E,MR$From adopted gammas.
204PB cG RI$0.249 {I20} (relative intensity)
204PB cG M$|a(K)exp=0.39 {I3}, K/L=5.4 {I8} (1971Ha39).
204PB G 663.43 15 0.0022 22[E2] 0.01542 ?
204PBS G KC=0.01165 17$LC=0.00286 4$MC=0.000697 10$NC+=0.000213 3
204PBS G NC=0.0001766 25$OC=3.39E-5 5$PC=2.94E-6 5
204PB cG RI$<0.0044 (relative intensity), from adopted gammas branching ratio
204PB L 2185.88 8 9- 66.93 M 10 M
204PB cL E$From adopted levels
204PB cL T$Weighted average of 67.5 min {I5} (1956He50), 66.9 min {I1}
204PB2cL (1958Ba04), 66 min {I3} (1972Si22), 67.2 min {I9} (1977SmZV), 68.4 min
204PB3cL {I24} (2001Li17)
204PB G 622.2 2 0.22 4 E5 0.417
204PBS G KC=0.1596 23$LC=0.190 3$MC=0.0519 8$NC+=0.01592 23
204PBS G NC=0.01329 19$OC=0.00246 4$PC=0.0001725 25
204PB cG E$From 1956He50.
204PB cG RI$0.219 {I20} (relative intensity)
204PB cG M$|a(K)exp=0.159 {I19}, K/L=0.83 {I4} (1971Ha39).
204PB G 911.74 15 91.5 13E5 0.0958
204PBS G KC=0.0544 8$LC=0.0308 5$MC=0.00809 12$NC+=0.00249 4
204PBS G NC=0.00207 3$OC=0.000390 6$PC=3.10E-5 5
204PB cG RI$From intensity balances using I|g(374.76|g)=94.20% {I14} and
204PB2cG I|g(289.30|g)=0.25% {I5}
204PB cG M$|a=0.099 {I2} in 1988ZhZT based on I|g(899)/I|g(912)=1.0935 {I10} and
204PB2cG intensity balance; |a(K)exp=0.056 {I3} (1954Ma78), 0.0549 {I20}
204PB3cG (1956He50), 0.055 {I5} (1972Gu06); K/L=1.66 {I25} (1972Gu06), 1.7 {I8}
204PB4cG (1956He50). Also from |g|g(|q) of 1955Kr06, 1956Hu30, 1967Li12.