245CM 245BK EC DECAY 1976AH03 23NDS 202305
245CM H TYP=FUL$AUT=C.D. Nesaraja$CIT=NDS 189, 1 (2023)$CUT=14-Feb-2023$
245CM c 1976Ah03: {+245}Bk was produced from the irradiation of {+243}Am with
245CM2c 34 MeV |a particles at the Argonne 152 cm cyclotron. The chemically
245CM3c mass separated {+245}Bk was then processed into a thin source.
245CM4c The electron capture decay of {+245}Bk was investigated by measuring
245CM5c the gamma-rays and conversion-electron spectra with Ge(Li) and
245CM6c Si(Li) detectors, respectively. Measured T{-1/2} of {+245}Bk, E|g,
245CM7c I|g, E(ce), Ice, ce|g-coin. Deduced levels, multipolarity, J|p and
245CM8c log{Ift}
245CM c 1975Ya03: {+245}Bk was produced from the {+241}Am(|a,x) reaction at
245CM2c the Argonne 60-in cyclotron. The conversion electron spectra from the
245CM3c chemically separated {+245}Bk were measured with a cooled Si(Li)
245CM4c detector. The |g rays were detected with a NaI(Tl) detector.
245CM5c Measured T{-1/2} of 356-keV level by |g-ce delayed coin.
245CM c 1956Ch77: {+245}Bk was produced from the {+243}Am(|a,2n) and
245CM2c {+244}Cm(|a,p2n) reactions at the Crocker Laboratory. The gammas were
245CM3c measured with a thallium-activated sodium iodide crystal detector and
245CM4c x-rays were detected using a xenon-filled proportional counter. The
245CM5c electron spectrum in coincidence with K x-rays was observed with an
245CM6c anthracene scintillation crystal. Deduced decay scheme.
245CM c 1956Ma32: {+245}Bk was produced from the {+244}Cm(d,n) and
245CM2c {+243}Am(|a,2n) reactions at the Argonne 60-in. cyclotron. Conversion
245CM3c electrons were measured with electron spectrometer, and the gammas
245CM4c were detected with a NaI detector. Measured ratios of conversion
245CM5c electron to K x-rays. Intensities of the x-rays were measured with the
245CM6c NaI detector.
245CM c 1979Ah01: The electron spectrum was measured with a cooled Si(Li)
245CM2c spectrometer and the photon spectrum measured with Ge(Li) diodes.
245CM3c From the measured intensities of K-Auger electrons and K x-rays,
245CM2c K-shell fluorescence yield for Cm was deduced: |w(K)=97.1% {I6}
245CM c
245CM tG $ ----------------------------------------------------------
245CM tG $ Measured x-ray intensities (1976Ah03)
245CM tG $ Energy Intensity x-ray
245CM tG $
245CM tG $ ----------------------------------------------------------
245CM tG $ 104.6 {I1} 35.0 {I24} Cm K|a{-2}|
245CM tG $ 109.3 {I1} 54.0 {I34} Cm K|a{-1}|
245CM tG $ 123.2 {I2} 20.5 {I15} Cm K|b{-1}'|
245CM tG $ 127.1 {I2} 7.3 {I5} Cm K|b{-2}'|
245CM tG $
245CM tG $ ----------------------------------------------------------
245CM c
245CM c Using program RADLST, the evaluator has calculated from the decay
245CM2c scheme, x-ray intensities as follows: K|a{-2}| x ray=35.1 {I22},
245CM3c K|a{-1}| x ray=55 {I4}, K|b| x ray=27.9 {I18}. These values are
245CM4c compared with experimental results (1976Ah03) of K|a{-2}| x ray=35.0
245CM5c {I24}, K|a{-1}| x ray=54.0 {I34}, and (K|b{-1}'| x ray=20.5 {I15} +
245CM6c K|b{-2}'|x ray=7.3 {I5})= 27.8 {I16}. This agreement confirms the
245CM7c quality of the data and the consistency of the decay scheme.
245CM c
245CM cE IE$Deduced by the evaluator from intensity balance at each level
245CM cG E,RI$From 1976Ah03
245CM cG M$From experimental conversion-electron data in 1976Ah03, except as
245CM2cG noted. These values deduced here are given in the Adopted Gammas
245CM cG M(M)$From Adopted Gammas
245CM cG MR(m)$From Adopted Gammas
245CM cG E(S)$|g-ray not observed in {+245}Bk |e decay; E|g from Adopted
245CM2cG Gammas
245CM cL J,T$From Adopted Levels
245CM cL E$From least-squares fit to E|g data by the evaluator
245CM DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
245BK P 0.0 (3/2-) 4.96 D 3 809.3 15
245BK cP QP$From 2021Wa16
245CM N 0.98 7 0.9988 1 1.0012 1
245CM PN 3
245CM cN NR$The evaluator has normalized the decay scheme assuming
245CM2cN no |e feeding neither to the {+245}Cm ground state (J|p=7/2+) nor to
245CM3cN the 55-keV level (J|p=9/2+), as expected from {+245}Bk (J|p=3/2-), and
245CM4cN using the sum of the intensities of the 252- and 198-keV |g rays
245CM5cN as the full strength of the |e decay (99.88 % 1).
245CM L 0.0 7/2+ 8423 Y 74
245CM L 54.819 20 9/2+ 0.10 NS LE
245CM G 54.77 3 S S
245CM L 252.833 23 5/2+
245CM E 90 9 7.02 5
245CMS E CK=0.6930 3$CL=0.2233 2$CM+=0.08365 10
245CM G 198.0 1 0.17 2 E2 1.023 14
245CMS G KC=0.1475 21$LC=0.634 9$MC=0.1778 25
245CMS G NC=0.0494 7$OC=0.01203 17$PC=0.002046 29$QC=1.829E-5 26
245CM2 G %IG=0.167 23
245CM cG $K:L12:L3=|<0.03:0.065 {I6}:0.025 {I3};|a(K)exp |<0.18,
245CM2cG |a(L12)exp =0.38, |a(L3)exp =0.15 (1976Ah03).
245CM G 252.85 5 31.3 20M1+E2 0.16 +6-4 2.25 5 MC
245CMF G FLAG=m
245CMS G KC=1.76 4$LC=0.366 6$MC=0.0895 14
245CMS G NC=0.0246 4$OC=0.00626 10$PC=0.001228 20$QC=8.66E-5 21
245CM2 G %IG=30.7 5
245CM cG $K:L12:L3:M:NO=53.2 {I37}:11.1 {I8}:0.081 {I8}:2.86
245CM2cG {I21}:1.11 {I8}; |a(K)exp =1.70,
245CM2cG |a(L12)exp =0.35, |a(L3)exp =0.0026, |a(M)exp=0.091,
245CM3cG |a(NO)exp =0.035 (1976Ah03).
245CM L 295.701 17 7/2+
245CM G 42.87 2 S
245CMF G FLAG=S
245CM G 240.90 4 M1 2.63 4 M S
245CMF G FLAG=S
245CMS G KC=2.064 29$LC=0.423 6$MC=0.1033 14
245CMS G NC=0.0284 4$OC=0.00722 10$PC=0.001421 20$QC=0.0001015 14
245CM G 295.73 2 M1+E2 0.39 +17-241.32 14 M S
245CMF G FLAG=Sm
245CMS G KC=1.02 12$LC=0.223 13$MC=0.0550 28
245CMS G NC=0.0151 8$OC=0.00384 20$PC=0.00075 5$QC=5.0E-5 6
245CM L 355.95 10 1/2+ 0.29 US 2 M
245CM cL T$From |g-ce delayed coincidence method (1975Ya03)
245CM E 5.7 14 8.00 11
245CMS E CK=0.6659 6$CL=0.2420 4$CM+=0.09208 17
245CM cE IE$Sum of |e intensities to 355.95, 361.4, 418.7 levels
245CM G 103.1 1 0.4 E2 16.25 24 C
245CMS G LC=11.74 17$MC=3.32 5
245CMS G NC=0.924 14$OC=0.2238 33$PC=0.0372 5$QC=0.0001572 23
245CM2 G %IG=0.39
245CM cG $L12:L3:M:NO=2.8 {I2}:1.83 {I13}:1.35 {I13}:0.50 {I6}.
245CM2cG (1976Ah03); |a(exp)= 16.6 (1975Ya03)
245CM cG RI$Deduced by the evaluator from total intensity provided in Fig. 10
245CM2cG (see note from pg.15) in 1976Ah03 and |a(BrIcc)
245CM L 361.4 4 3/2+
245CM E
245CM L 418.7 4 5/2+
245CM E
245CM L 633.63 11 (3/2)-
245CM E 2.61 26 7.09 5
245CMS E CK=0.247 9$CL=0.523 6$CM+=0.230 3
245CM G 272.2 3 0.013 3 [E1] 0.0537 8
245CMS G KC=0.0420 6$LC=0.00878 12$MC=0.002142 30
245CMS G NC=0.000584 8$OC=0.0001458 21$PC=2.71E-5 4$QC=1.486E-6 21
245CM2 G %IG=0.0127 31
245CM G 380.8 1 2.58 18E1 0.0264 4 C
245CMS G KC=0.02091 29$LC=0.00413 6$MC=0.001003 14
245CMS G NC=0.000274 4$OC=6.87E-5 10$PC=1.296E-5 18$QC=7.65E-7 11
245CM2 G %IG=2.53 24
245CM cG $L12:M=0.011 {I1}:0.0043 {I8}; |a(L12)exp =0.0043,
245CM2cG |a(M)exp =0.0017(1976Ah03).
245CM L 661.52 8 (5/2)-
245CM E 0.62 6 7.46 5
245CMS E CK=0.076 10$CL=0.633 6$CM+=0.291 4
245CM G 365.8 1 0.39 3 E1 0.0287 4
245CMS G KC=0.02268 32$LC=0.00451 6$MC=0.001096 15
245CMS G NC=0.000299 4$OC=7.50E-5 11$PC=1.412E-5 20$QC=8.27E-7 12
245CM2 G %IG=0.38 4
245CM cG $Ice(K)=0.013 {I4}; |a(K)exp =0.033 (1976Ah03).
245CM G 408.7 1 0.23 2 [E1] 0.0228732
245CMS G KC=0.01816 25$LC=0.00355 5$MC=0.000861 12
245CMS G NC=0.0002349 33$OC=5.90E-5 8$PC=1.116E-5 16$QC=6.69E-7 9
245CM2 G %IG=0.225 25
245CM L 740.97 12 (1/2+)
245CM E 1.04 10 6.37 5
245CMS E CL=0.589 5$CM+=0.411 5
245CM G 385.0 1 0.61 4 M1 0.718 10 C
245CMS G KC=0.565 8$LC=0.1147 16$MC=0.0280 4
245CMS G NC=0.00769 11$OC=0.001958 27$PC=0.000385 5$QC=2.74E-5 4
245CM2 G %IG=0.60 6
245CM cG $K:L12:M:NO=0.340 {I25}:0.075 {I7}:0.023 {I2}:0.010 {I2};
245CM2cG |a(K)exp =0.56, |a(L12)exp =0.12, |a(M)exp =0.038
245CM3cG |a(NO)exp =0.016(1976Ah03).
245CM G 488.2 2 0.015 3 [E2] 0.0623 9
245CMS G KC=0.0345 5$LC=0.02039 29$MC=0.00546 8
245CMS G NC=0.001511 21$OC=0.000373 5$PC=6.73E-5 9$QC=2.012E-6 28
245CM2 G %IG=0.0147 31
245CM L 769.2 4 (3/2)+
245CM E 0.184 20 6.42 8
245CMS E CL=0.38 3$CM+=0.62 3
245CM G 350.5 1 0.082 7 M1 0.929 13
245CMS G KC=0.731 10$LC=0.1487 21$MC=0.0363 5
245CMS G NC=0.00996 14$OC=0.00254 4$PC=0.000499 7$QC=3.56E-5 5
245CM2 G %IG=0.080 9
245CM cG $K:L12=0.061 {I6}:0.014 {I2}; |a(K)exp =0.74,
245CM2cG |a(L12)exp =0.17 (1976Ah03).
245CM G 407.8 2 0.03
245CM2 G %IG=0.029 6
245CM cG $ce(K)(407.8|g+408.7|g)=0.017 {I2} (1976Ah03).