206PB 206TL B- DECAY 1968ZO02,1972COYX,1972GR0125NDS 202503
206PB H TYP=FUL$AUT=F.G. KONDEV$CIT=NDS 201, 346 (2025)$CUT=21-Jan-2025$
206PB c 1970Zo02,1968Zo02: chemically purified {+206}Tl source produced at the
206PB2c MIT reactor. |g rays were measured with a 26 cm{+3} Ge(Li) detector and
206PB3c |b rays were measured with a 2|p proportional counter equipped with
206PB4c anti-coincidence guard counters
206PB c 1972CoYX: chemically purified {+206}Tl source produced at the ORNL
206PB2c reactor. Absolute |g rays [Ge(Li) detector] and |b rays were measured
206PB c 1972Gr01: chemically purified {+206}Tl source produced at the UMichigan
206PB2c reactor. |g rays were measured with Ge(Li) detectors and |b rays
206PB3c were measured with a 4|p|b counter
206PB c Others (experiment): 1951Al14, 1961Ho17, 1963Bu23, 1970Fl12, 1971Pe03,
206PB2c 1972Wi18
206PB c Others (theory): 1963Bu23, 1969Da25, 1980Kr09, 1985To20, and 1987Ki11
206PB cL E,J,T$From adopted levels
206PB cB IB$From I(|g+ce) values and the decay scheme
206PB cG E,M$From adopted gammas
206PB DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
206PB DB EAV,LOGFT$FROM BetaShape v2.4 (Jun-2024) 2023MO21.
206TL P 0.0 0- 4.202 M 14 1532.2 6
206TL cP J,T$From adopted levels for {+206}Tl
206TL cP QP$From 2021Wa16
206PB N 1.0 1.0 1.0 1.0
206PB PN 3
206PB L 0.0 0+
206PB B 99.885 19 5.2711 15
206PBS B EAV=533.29 24
206PB cB $Experimental shape factor, Cexp(W)=1+C{-1}W, with C1=-0.020 2
206PB2cB (1972Wi18,1970Fl12) was used
206PB DB $Cexp(W)=1+C{-1}W
206PB cB E$Measured values are 1523 {I4} (1970Fl12), 1534 {I5} (1971Pe03),
206PB2cB 1527 {I4} (1972Wi18), 1510 {I10} (1951Al14) and 1571 {I10} (1961Ho17).
206PB cB $The shape of this 0- to 0+ |b spectrum has been measured by
206PB2cB 1961Ho17 (A=-0.154, B=-0.484), 1970Fl12 (A=-0.017 {I5}, B=0.030 {I9}),
206PB3cB 1971Pe03 (A=0.00 {I1}), and 1972Wi18 (A=-0.020 {I2}, from same data as
206PB4cB 1970Fl12). If shape is needed, the result of 1972Wi18 is recommended.
206PB cB IB$From 100 - I{-|b{+-}}(803-keV level) - I{-|b{+-}}(1166-keV level)
206PB L 803.043 25 2+ 8.17 PS 8
206PB B 0.0051 5 8.675 43 1U
206PBS B EAV=227.21 20
206PB G 803.04 3 0.0050 5 E2 0.0103214
206PBS G KC=0.00803 11$LC=0.001742 24$MC=0.000420 6
206PBS G NC=0.0001063 15$OC=2.059E-5 29$PC=1.890E-6 26
206PB cG RI$Weighted average of 0.0055% {I4} (1970Zo02), 0.0041% {I6} (1972CoYX)
206PB2cG and 0.0040% {I10} (1972Gr01)
206PB L 1166.4 3 0+ 0.75 NS 4
206PB B 0.110 19 6.08 8
206PBS B EAV=103.87 19
206PB G 363.3 5 0.00013 4 [E2] 0.0668 10 S
206PBS G KC=0.0418 6$LC=0.01875 28$MC=0.00476 7
206PBS G NC=0.001204 18$OC=0.0002235 33$PC=1.505E-5 22
206PB cG E$From level energy differences.
206PB cG RI$From <0.00026% in 1972CoYX, which is a 2|s limit. Others: <0.001%
206PB2cG (1972Gr01) and <0.001% (1968Zo02).
206PB G 1166.4 5 E0 0.110 19
206PB cG E$From adopted gammas
206PB cG TI$Based on the assumption that the K x rays are produced from the E0
206PB2cG transition and shake-off electrons. I(|g+ce) is deduced as follow:
206PB3cG (a) I(K| x ray) is the weighted mean of I(K| x ray)=0.08% {I2}
206PB4cG (1972Gr01) and 0.10% {I2} (1972CoYZ), deduced after a correction for
206PB5cG shake-off was taken into account; (b) Ice(K)=I(K| x ray)/|w(K), where
206PB6cG the fluorescence yield is |w(K)=0.963 {I4} (1996Sc06); (c)
206PB7cG ce(K)/tot=0.85 {I6}, the weighted average of 0.85 {I6} and 0.86
206PB8cG {I14}, values deduced from the measured K/L=5.61 {I38} (1990Tr01) and
206PB9cG 6.0 {I10} (1977Dr08), respectively. It should be noted that the BRICC
206PBacG program (2008Ki07) gives ce(K)/tot=|W(E0,K)/|W(E0,T)=0.8554 in very
206PBbcG good agreement with the experimentally determined value of 0.85 {I6}.
206PBccG Thus, I(|g+ce)=I(K| x ray)/|w(K)/[ce(K)/tot]=0.090% {I10}/0.963{I4}/
206PBdcG 0.85 {I6}=0.110% 19.