234TH    238U A DECAY                  2014Po02,2000Ga05,1959Ko5826NDS    202601
234TH  H TYP=FUL$AUT=S. Ota$CIT=NDS 207, 351 (2026)$CUT=1-Dec-2023$
234TH c  2014Po02: Highly enriched (99.99922% in mass percent) {+238}U was
234TH2c  produced through electrodeposition. |a decays were measured with PIPS
234TH3c  (Passivated Implanted Planar Silicon) detectors at two different
234TH4c  institutions (IRMM in Belgium and CIEMAT in Spain) for 1-2 years in
234TH5c  three different set-ups. A bending magnet system was put into use to
234TH6c  largely eliminate conversion electrons.
234TH c  2000Ga05: Sources of natural uranium (2-4 Bq) were prepared by vacuum
234TH2c  evaporation onto stainless steel disks. |a-decays were measured with
234TH3c  Si detectors. 20 keV FWHM energy resolution.
234TH c  1960Be25: |a|g(t): (|a)(ce 48|g)(t) T{-1/2}=0.37 ns {I3}
234TH cA E$Energies of |a's to 0.0 and 49.55-keV levels are from 1991Ry01,
234TH2cA recommended from energies measured by 1957Ha08, 1961Ko11, 1960Vo05.
234TH3cA Original energies of 1957Ha08, 1960Vo05 and 1961Ko11 were increased
234TH4cA by 4.5, 3.3 and 6.0 keV, respectively, because of changes in
234TH5cA calibration energies. Other measurements: 1947Al06, 1955Va20,
234TH6cA 1957Bo98, 1957Cl17.
234TH cA HF$Deduced by evaluators using the ALPHAD program with
234TH2cA r{-0}({+234}Th)=1.535 {I2} by assuming HF(4198|a)=1.0 (2020SI16).
234TH cG RI$From 1984Ro21.
234TH cL J$Adopted values.
234TH c  Others: 1990Ko40, 1984Ro21, 1973Ta25 (Si(Li) detector), 1961Ko11
234TH2c  (ionization chamber), 1960Vo05 (ionization chamber), 1959Ko58,
234TH3c  1957Bo98, 1957Cl17, 1957Ha08 (ionization chamber), 1956Al30,
234TH4c  1955Va20, 1952Du12, 1952Za01, 1947Al06.
234TH cL E$From E|g.
234TH D  Transition strength is calculated by Java-RULER (version 28-Apr-2022)
234TH D  CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
238U   P 0.0          0+               4.468E+9 Y 6              4269.9   21
238U  cP T$From {+238}U Adopted level (2015Br06)
238U  cP QP$From 2021WA16
234TH  N 1.0          1.0       1.0
234TH PN                                                                     3
234TH  L 0.0          0+
234TH  A 4198      3 77.01   101.0
234TH cA IA$from 2014Po02. Others: 77.54% {I50} (2000Ga05), 77% {I4}
234TH2cA (1959Ko58).
234TH  L 49.55     6  2+                0.37 NS   3
234TH cL T$from (|a)(ce)(48|g)(t) (1960Be25).
234TH  G 49.55     6  0.064  8  E2                      322   5
234THS G LC=235 4$MC=64.4 10$NC=17.24 26$OC=3.83 6$PC=0.632 10$QC=0.001692 25
234TH cG E$from 1973Ta25 (Si(Li) detector). Other: 1956Al30 ((|a)(ce)).
234TH cG $Others: I|g=0.059% {I2} was measured by 1990Ko40. 0.080% {I15} when
234TH2cG calculating from the adopted I|a and ICC (contribution from the
234TH3cG higher level included).
234TH cG $Total I(ce)=23 {I3} per 100 |a decays (1952Du12,1952Za01,1956Al30).
234TH cG M$|a=359 {I65} from Ice/I|g and the measured half-life of 0.37 ns
234TH2cG {I3} for the 49.55-keV level rule out other multipolarities.
234TH  A 4151      5 22.92   101.4
234TH cA IA$from 2014PO02. Others: 22.33% {I50} (2000Ga05), 23% {I4}
234TH2cA (1959Ko58).
234TH cA $E|a(0)=4198 {I3} and E(level)=49.55 {I6} gives E|a=4149 {I3}.
234TH  L 163.05    12 4+
234TH  G 113.5     1  0.0102 15 [E2]                    6.49  9
234THS G KC=0.2332 33$LC=4.58 7$MC=1.258 18$NC=0.337 5$OC=0.0752 11$
234THS G PC=0.01250 18$QC=6.40E-5 9
234TH cG E$from 1984Ro21.
234TH cG $Other: I|g=0.0091% {I13} when calculating from the adopted I|a and
234TH2cG ICC.
234TH  A 4038      5 0.068   1045
234TH cA IA$from 2014Po02. Others: 0.13% {I3} (2000Ga05), 0.23 {I7} (1959Ko58).
234TH cA E$from E(level)=163.0 and E|a(to g.s.). The original measured value
234TH2cA of 1961Ko11 is 4037 keV; adjustment as recommended by 1991Ry01 yields
234TH3cA 4043.