249CF 249ES EC DECAY 1976AH07 24NDS 202403
249CF H TYP=FUL$AUT=C.D. Nesaraja$CIT=NDS 195, 718 (2024)$CUT=12-Oct-2023$
249CF c 1976Ah07: {+249}Es was produced by bombarding 18 MeV deuterons
249CF2c on {+249}Cf target at the Argonne 60 inch cyclotron. The irradiated
249CF3c target was mass separated. Low-energy gammas from the decay
249CF4c of {+249}Es were measured with a planar Ge(Li) with FWHM=600 eV at
249CF5c E|g=100 keV, high-energy gammas were measured with a coaxial
249CF6c Ge(Li) detector, and conversion electrons were measured with a Si(Li)
249CF7c detector with FWHM=1.0 keV at E(electron)=100 keV and FWHM=1.6 keV
249CF8c at E(electron)=600 keV. Measured E|g, I|g, conversion electron spectra,
249CF9c E(ce), I(ce), |a, T{-1/2}({+249}Es), branching ratio.
249CFac Deduced level scheme and multipolarity
249CF c 1970Ah01: {+249}Es was produced from {+249}Bk(|a,4n) reaction with
249CF2c E({+4}He)= 45 MeV from the Argonne cyclotron. The target was purified
249CF3c prior to irradiation to remove {+249}Cf that formed from the decay of
249CF4c {+249}Bk. Chemical separation was done after the irradiation to remove
249CF5c fission products. Gamma rays were measured with Ge(Li) and NaI(Tl)
249CF6c detectors. Measured |g|g coincidence and Cf(Xrays).
249CF c
249CF tG $ ----------------------------------------------
249CF tG $ The Cf x-ray intensities (1970Ah01):
249CF tG $ E(x ray) I(x ray) Cf x ray
249CF tG $ 109.6 0.67 {I7} K{-|a2}
249CF tG $ 114.8 0.98 {I1} K{-|a1}
249CF tG $ 129.3 +133.4 0.55 {I6} K{-|b}+K{-|b2}
249CF tG $ ----------------------------------------------
249CF c
249CF tG $ ----------------------------------------------
249CF tG $ The Cf x-ray intensities (1976Ah07):
249CF tG $ E(x ray) I(x ray) Cf x ray
249CF tG $ 109.83 {I5} 24.4 {I15} K{-|a2}
249CF tG $ 115.04 {I5} 38.0 {I23} K{-|a1}
249CF tG $ 128.61 {I5} 4.8 {I3} K{-|b3}
249CF tG $ 129.84 {I5} 9.5 {I6} K{-|b1}
249CF tG $ 133.59 {I5} 3.9 {I3} K{-|b2}+K{-|b4}
249CF tG $ 134.73 {I5} 1.23 {I9} K{-O2,3}
249CF tG $ ----------------------------------------------
249CF c
249CF cE TI$Deduced by evaluator from intensity balance at each level
249CF cG M,MR$From conversion coefficients deduced by the evaluator
249CF2cG from Ice and I|g data measured by 1976Ah07. The evaluator
249CF3cG has normalized the experimental conversion coefficient values
249CF4cG using the Normalized to Peak Gamma Method (NPG).
249CF3cG Three well-known E2 gamma transistions were used in the
249CF4cG normalization N(|g)=|a(K)(BrICC)/|a(K)(exp): 789.7, 813.2 and 852.2
249CF5cG transitions with 1.00(18), 1.04 (13), 0.99 (17), respectively giving
249CF6cG a weighted average N=1.02 {I13}. |a(normalized)=N*(Ice/I|g)
249CF7cG are given in comments. All values are given in the Adopted Gammas
249CF8cG as well.
249CF cG M(A)$From analysis of anomalous M2 conversion coefficients, see
249CF2cG 1993Li52
249CF cL E$From least-squares fit to E|g data by the evaluator
249CF cL J$From Adopted Levels. Band assignments are from 1976Ah07.
249CF cL T$From Adopted Levels
249CF cL BAND(A)$9/2-[734] Band
249CF cL BAND(B)$5/2+[622] Band
249CF cL BAND(C)$7/2+[624] Band
249CF cL BAND(D)$7/2+[613] Band
249CF cL BAND(E)$K|p=5/2-
249CF2cL Gamma vibrational band built on 9/2[734]
249CF DG CC$FROM BrIcc v2.3e (17-Jun-2020) 2008Ki07, "Frozen Orbitals" appr.
249ES P 0 7/2+ 102.2 M 6 1450 SY
249ES cP T$From Adopted Levels. Note that 1976Ah07 measured
249ES2cP t{-1/2}= 102.3 min {I6} for {+249}Es from decay of the 379.5|g
249ES3cP that was measured with a Ge(Li) detector
249ES cP QP$1450 {I30} (2021Wa16)
249CF N 1.01 131.01 130.9943 8 1.0057
249CF PN 1.0 3
249CF cN NR$From (100-I|e to g.s.)/(|SI(|g+ce)to g.s.)
249CF G 1000.5 5 0.020 8
249CF G 1021.4 5 0.01 AP
249CF L 0 9/2- 351 Y 2 A
249CF E 0.0025 12 26 9 6.72 16 26 9
249CFS E EAV=222 14$CK=0.7428 7$CL=0.1884 5$CM+=0.06871 23
249CF cE IE$Calculated by evaluator from measured I(K x ray) - [I(K x
249CF2cE ray (from ce(K))) + I(K x ray (from |e to excited levels))].
249CF3cE The observed K x ray intensities were converted into K shell
249CF4cE vacancies with K-shell fluorescence |w= 0.973 {I4} (1979Ah01).
249CF5cE With I(K x ray)=81.8 {I50} (1976Ah07)
249CF6cE from the adopted decay scheme;
249CF7cE I(K x ray (from ce(K)))=3.88 {I23};
249CF8cE I(K x ray (from |e to excited levels))=51.1 {I79};
249CF9cE |w= 0.973 {I4} (1979Ah01);
249CFacE I((|e to g.s.))=26 {I9} is deduced
249CF L 62.49 4 11/2- A
249CF E 1.1 7 8.9 3 1.1 7 1U
249CFS E CK=0.7038 19$CL=0.2152 13$CM+=0.0810 6
249CF G 62.47 5 0.127 10M1+E2 0.291 +29-3146.9 26
249CFS G LC=34.6 19$MC=9.0 5
249CFS G NC=2.50 15$OC=0.64 4$PC=0.115 6$QC=0.00479 9
249CF cG M,MR$From |a(L1)exp=20.9 {I39}, |a(L3)exp=4.8 {I9}
249CF L 136.22 35 13/2- A
249CF G 73.7 [M1,E2] 6.E1 40.1 LT S
249CFS G L/T=0.71 34$M/T=0.20 16
249CFS G N/T=0.06 5$O/T=0.014 12$P/T=0.0023 20$Q/T=3.3E-5 30
249CFS G LC=41 26$MC=11 8
249CFS G NC=3.2 22$OC=0.8 5$PC=0.13 8$QC=0.0019 13
249CF G 136.2 [E2] 5.53 80.1 LT S
249CFS G K/T=0.01806 33$L/T=0.597 6$M/T=0.1700 28
249CFS G N/T=0.0478 9$O/T=0.01186 22$P/T=0.001914 35$Q/T=9.40E-6 17
249CFS G KC=0.1179 17$LC=3.90 5$MC=1.110 16
249CFS G NC=0.312 4$OC=0.0774 11$PC=0.01250 17$QC=6.14E-5 9
249CF L 144.96 5 5/2+ 45 US 5 BM
249CF E 3.6 25 7.5 3 3.6 25
249CFS E CK=0.7391 9$CL=0.1910 7$CM+=0.0699 3
249CF G 144.99 6 0.18 2 M2+E3 0.42 +11-1264.9 11 A
249CFS G KC=30.7 25$LC=24.5 21$MC=7.1 7
249CFS G NC=2.01 21$OC=0.51 5$PC=0.091 7$QC=0.00350 22
249CF cG M,MR$From |a(L1)exp=13.0 {I26}, |a(L2)exp=6.1 {I12}, |a(L3)exp=4.7 {I9}
249CF2cG |a(M1+M2)exp=5.5 {I11}, |a(M3+M4+M5)exp=1.59 {I32}, |a(N)exp=2.89 {I57}
249CF L 187.94 6 7/2+ B
249CF G 43.00 5 0.033 7 M1+E2 0.27 +8-10 1.8E+2 5
249CFS G LC=1.30E+2 34$MC=34 10
249CFS G NC=9.6 27$OC=2.4 7$PC=0.43 10$QC=0.0147 4
249CF cG M,MR$From |a(N+)exp=9.6 {I27}.
249CF L 243.07 6 9/2+ B
249CF E 0.6 7 8.2 5 0.6 7
249CFS E CK=0.7359 11$CL=0.1932 8$CM+=0.0709 4
249CF G 55.14 5 0.032 7 M1+E2 0.14 12 55 14
249CFS G LC=41 10$MC=10.2 30
249CFS G NC=2.8 8$OC=0.73 21$PC=0.138 31$QC=0.00724 25
249CF cG M,MR$From |a(L12)exp=32 {I10},|a(M)exp=11.5 {I33}.
249CF L 379.52 5 7/2+ C
249CF E 39.2 28 6.25 5 39.2 28
249CFS E CK=0.7304 15$CL=0.1970 10$CM+=0.0726 5
249CF G 136.37 8 0.065 15[M1] 15.50 22
249CFS G KC=12.01 17$LC=2.61 4$MC=0.641 9
249CFS G NC=0.1777 25$OC=0.0461 7$PC=0.00891 13$QC=0.000525 7
249CF G 191.6 1 0.40 3 M1+E2 0.53 +18-195.0 5
249CFS G KC=3.7 5$LC=0.962 19$MC=0.2436 34
249CFS G NC=0.0677 10$OC=0.01740 25$PC=0.00325 8$QC=0.000159 21
249CF cG M,MR$From |a(L1+L2)exp=0.82 {I14}, |a(L3)exp=0.054 {I20},
249CF2cG |a(M)exp=0.222 {I50}
249CF G 234.6 1 0.26 3 M1+E2 4.7 15 0.75 13
249CFS G KC=0.23 12$LC=0.378 10$MC=0.1057 21
249CFS G NC=0.0297 6$OC=0.00740 16$PC=0.00124 4$QC=1.6E-5 5
249CF cG M,MR$From |a(K)exp=0.200 {I86}, |a(L1+L2)exp=0.314 {I72},
249CF2cG |a(L3)exp=0.054 {I20}
249CF G 379.5 1 40.6 25E1 0.0281 4
249CFS G KC=0.02213 31$LC=0.00451 6$MC=0.001100 15
249CFS G NC=0.000303 4$OC=7.73E-5 11$PC=1.422E-5 20$QC=6.86E-7 10
249CF cG M$From |a(K)exp=0.026 {I4}, |a(L1+L2)exp=0.005 {I1},
249CF2cG |a(K)exp=0.00048 {I14}, |a(M)exp=0.0015 {I3}
249CF L 437.56 5 9/2+ C
249CF E 8.3 10 6.87 6 8.3 10
249CFS E CK=0.7276 17$CL=0.1990 12$CM+=0.0734 5
249CF G 58.01 5 0.044 7 M1+E2 0.52 9 95 15
249CFS G LC=69 10$MC=18.8 31
249CFS G NC=5.3 9$OC=1.32 21$PC=0.224 32$QC=0.00534 28
249CF cG M,MR$From |a(L1)exp=23.2 {I59}, |a(L2)exp=32.2 {I77},
249CF2cG |a(L3)exp=16.7 {I33}, |a(M1+M2)exp=15.0 {I40},
249CF3cG |a(M3+M4+M5)exp=6.0 {I15}
249CF G 375.1 1 3.3 3 E1 0.0288 4
249CFS G KC=0.02265 32$LC=0.00462 6$MC=0.001128 16
249CFS G NC=0.000310 4$OC=7.93E-5 11$PC=1.457E-5 20$QC=7.01E-7 10
249CF cG M$From |a(K)exp=0.0257 {I49},|a(L1+L2)exp=0.0056 {I18}
249CF G 437.6 1 0.75 5 E1 0.0211930
249CFS G KC=0.01675 23$LC=0.00333 5$MC=0.000812 11
249CFS G NC=0.0002235 31$OC=5.72E-5 8$PC=1.059E-5 15$QC=5.25E-7 7
249CF cG M$From |a(K)exp=0.0245 {I54}.
249CF L 442.98 6 7/2+ D
249CF E 3.47 29 7.25 5 3.47 29
249CFS E CK=0.7273 17$CL=0.1992 12$CM+=0.0735 6
249CF G 63.45 5 0.058 7 M1 32.0 5
249CFS G LC=23.99 34$MC=5.91 8
249CFS G NC=1.637 23$OC=0.425 6$PC=0.0822 12$QC=0.00486 7
249CF cG M$From |a(L1)exp=22.8 {I49}
249CF G 255.0 2 0.11 3 M1 2.69 4
249CFS G KC=2.097 30$LC=0.441 6$MC=0.1084 15
249CFS G NC=0.0300 4$OC=0.00779 11$PC=0.001505 21$QC=8.82E-5 12
249CF cG M$From |a(L1+L2)exp=0.56 {I20}.
249CF G 298.0 1 0.56 4 M1 1.741 24
249CFS G KC=1.360 19$LC=0.286 4$MC=0.0701 10
249CFS G NC=0.01941 27$OC=0.00504 7$PC=0.000973 14$QC=5.69E-5 8
249CF cG M$From |a(K)exp=1.29 {I23}, |a(L1+L2)exp=0.291 {I56}
249CF2cG |a(M)exp=0.082 {I16}, |a(N)exp=0.036 {I12}
249CF G 443.1 3 0.031 9 [E1] 0.0206829
249CFS G KC=0.01635 23$LC=0.00325 5$MC=0.000791 11
249CFS G NC=0.0002177 31$OC=5.57E-5 8$PC=1.032E-5 15$QC=5.13E-7 7
249CF L 500.67 31 (9/2+) D ?
249CF G 63.1 [M1,E2] 1.1E+2 80.050 15 S
249CFS G L/T=0.7 4$M/T=0.20 18
249CFS G N/T=0.06 6$O/T=0.014 14$P/T=0.0023 22$Q/T=2.7E-5 25
249CFS G LC=8.E1 6$MC=23 17
249CFS G NC=6 5$OC=1.6 12$PC=0.26 18$QC=0.0031 19
249CF L 813.20 8 (5/2)- E
249CF E 10.0 6 6.33 6 10.0 6
249CFS E CK=0.693 5$CL=0.223 4$CM+=0.0841 16
249CF G 370.1 2 0.14 4 [E1] 0.0296 4
249CFS G KC=0.02326 33$LC=0.00476 7$MC=0.001161 16
249CFS G NC=0.000320 4$OC=8.16E-5 11$PC=1.499E-5 21$QC=7.19E-7 10
249CF G 433.7 3 0.062 10[E1] 0.0215630
249CFS G KC=0.01704 24$LC=0.00340 5$MC=0.000827 12
249CFS G NC=0.0002277 32$OC=5.83E-5 8$PC=1.078E-5 15$QC=5.34E-7 8
249CF G 625.3 2 0.130 13[E1] 0.0108015
249CFS G KC=0.00862 12$LC=0.001634 23$MC=0.000396 6
249CFS G NC=0.0001089 15$OC=2.80E-5 4$PC=5.25E-6 7$QC=2.78E-7 4
249CF G 668.3 2 0.240 19 E1 0.0095713
249CFS G KC=0.00766 11$LC=0.001440 20$MC=0.000348 5
249CFS G NC=9.59E-5 13$OC=2.466E-5 35$PC=4.64E-6 6$QC=2.476E-7 35
249CF cG M$From |a(K)exp|?0.038.
249CF G 813.2 1 9.2 6 E2 0.0230932
249CFS G KC=0.01578 22$LC=0.00540 8$MC=0.001398 20
249CFS G NC=0.000389 5$OC=9.92E-5 14$PC=1.810E-5 25$QC=6.87E-7 10
249CF cG M$From |a(K)exp=0.016 {I3}, |a(L1+L2)exp=0.0051 {I9},
249CF2cG |a(L3)exp=0.00055 {I24}, |a(M)exp=0.00155 {I40}
249CF L 852.19 7 (7/2)- E
249CF E 2.15 12 6.93 6 2.15 12
249CFS E CK=0.687 6$CL=0.227 4$CM+=0.0862 19
249CF G 609.2 4 0.03 AP[E1] 0.0113216
249CFS G KC=0.00904 13$LC=0.001719 24$MC=0.000416 6
249CFS G NC=0.0001146 16$OC=2.94E-5 4$PC=5.52E-6 8$QC=2.91E-7 4
249CF G 664.0 5 0.01 AP [E1] 0.0096814
249CFS G KC=0.00775 11$LC=0.001457 21$MC=0.000353 5
249CFS G NC=9.70E-5 14$OC=2.496E-5 35$PC=4.69E-6 7$QC=2.504E-7 35
249CF G 707.0 5 0.03 AP [E1] 0.0086512
249CFS G KC=0.00693 10$LC=0.001295 18$MC=0.000313 4
249CFS G NC=8.61E-5 12$OC=2.217E-5 31$PC=4.18E-6 6$QC=2.249E-7 32
249CF G 789.7 1 1.15 9 E2 0.0244834
249CFS G KC=0.01658 23$LC=0.00583 8$MC=0.001515 21
249CFS G NC=0.000422 6$OC=0.0001074 15$PC=1.956E-5 27$QC=7.27E-7 10
249CF cG M$From |a(K)exp=0.017 {I4}.
249CF G 852.2 1 0.88 7 E2 0.0210529
249CFS G KC=0.01459 20$LC=0.00478 7$MC=0.001234 17
249CFS G NC=0.000343 5$OC=8.75E-5 12$PC=1.603E-5 22$QC=6.27E-7 9
249CF cG M$From |a(K)exp=0.0151 {I32}, |a(L1+L2)exp=0.0070 {I25}
249CF L 902.52 17(9/2-) E
249CF E 0.18 6 7.91 16 0.18 6
249CFS E CK=0.676 8$CL=0.234 6$CM+=0.0895 24
249CF G 766.3 3 0.10 1 [E2] 0.0260 4 &
249CFS G KC=0.01744 24$LC=0.00632 9$MC=0.001645 23
249CFS G NC=0.000458 6$OC=0.0001166 16$PC=2.119E-5 30$QC=7.71E-7 11
249CF G 840.0 2 0.097 9 [M1,E2] 0.06 4
249CFS G KC=0.048 33$LC=0.011 6$MC=0.0027 14
249CFS G NC=7.E-4 4$OC=1.9E-4 10$PC=3.7E-5 20$QC=2.0E-6 13
249CF G 902.6 3 0.018 6 [M1,E2] 0.052 33
249CFS G KC=0.040 27$LC=0.009 5$MC=0.0022 11
249CFS G NC=6.1E-4 32$OC=1.6E-4 8$PC=3.0E-5 16$QC=1.6E-6 11
249CF L 1007.97 6 (9/2+)
249CF cL $Configuration=9/2[615] (1976Ah07)
249CF E 1.70 10 6.70 9 1.70 10
249CFS E CK=0.643 14$CL=0.257 10$CM+=0.100 5
249CF G 507.3 3 0.04 1 [M1,E2] 0.23 17
249CFS G KC=0.18 14$LC=0.044 22$MC=0.011 5
249CFS G NC=0.0030 14$OC=8.E-4 4$PC=1.5E-4 8$QC=7.E-6 6
249CF G 565.0 2 0.210 17M1 0.302 4
249CFS G KC=0.2362 33$LC=0.0490 7$MC=0.01200 17
249CFS G NC=0.00332 5$OC=0.000862 12$PC=0.0001664 23$QC=9.73E-6 14
249CF cG M$From |a(K)exp=0.233 {I46}, |a(L1+L2)exp=0.049 {I16}
249CF G 570.3 3 0.054 14M1 0.294 4
249CFS G KC=0.2303 32$LC=0.0477 7$MC=0.01170 16
249CFS G NC=0.00324 5$OC=0.000840 12$PC=0.0001622 23$QC=9.48E-6 13
249CF cG M$From |a(K)exp=0.189 {I79}.
249CF G 628.5 2 0.210 17M1(+E2) 0.71 +31-280.163 34
249CFS G KC=0.126 27$LC=0.028 5$MC=0.0069 11
249CFS G NC=0.00192 30$OC=0.00050 8$PC=9.5E-5 16$QC=5.2E-6 11
249CF cG M$From |a(K)exp=0.126 {I27}.
249CF G 766.3 3 0.10 1 [M1,E2] 0.08 5 & ?
249CF3 G FL=243.07
249CFS G KC=0.06 4$LC=0.014 8$MC=0.0034 18
249CFS G NC=1.0E-3 5$OC=2.5E-4 13$PC=4.7E-5 26$QC=2.5E-6 17
249CF cG E$Poor fit in the level. Level-energy difference=764.9 {I1}
249CF G 820.5 5 0.01 AP [M1,E2] 0.07 4
249CFS G KC=0.051 35$LC=0.012 6$MC=0.0029 15
249CFS G NC=8.E-4 4$OC=2.0E-4 11$PC=3.9E-5 21$QC=2.1E-6 14
249CF G 862.8 3 0.018 6 [E2] 0.0205429
249CFS G KC=0.01428 20$LC=0.00463 6$MC=0.001194 17
249CFS G NC=0.000332 5$OC=8.47E-5 12$PC=1.553E-5 22$QC=6.12E-7 9
249CF G 945.4 1 0.24 2 (E1) 0.00521 7
249CFS G KC=0.00420 6$LC=0.000762 11$MC=0.0001835 26
249CFS G NC=5.05E-5 7$OC=1.303E-5 18$PC=2.475E-6 35$QC=1.385E-7 19
249CF cG M$Deduced by authors (1976Ah07) from upper limit set for
249CF2cG ce(K)
249CF G 1007.9 1 0.73 6 (E1) 0.00467 7
249CFS G KC=0.00377 5$LC=0.000681 10$MC=0.0001637 23
249CFS G NC=4.51E-5 6$OC=1.163E-5 16$PC=2.213E-6 31$QC=1.247E-7 17
249CF cG M$Deduced by authors (1976Ah07) from upper limit set for
249CF2cG ce(K)
249CF L 1199.8 4 (7/2-,9/2)
249CF E 0.026 AP 7.8 AP 0.026 AP
249CFS E CK=0.46 8$CL=0.38 6$CM+=0.16 3
249CF G 1137.3 5 0.01 AP
249CF G 1199.8 5 0.016 6
249CF L 1218.50 10(7/2)-
249CF cL E$K|p=7/2-. Three-quasiparticle state.
249CF cL $Configuration=((|p 7/2[633])(|p 3/2[521])(|n 3/2[622])) (1976Ah07)
249CF E 1.56 10 5.92 21 1.56 10
249CFS E CK=0.41 11$CL=0.41 7$CM+=0.18 4
249CF G 1218.5 1 1.51 10M1+E2 0.62 +29-280.030 5
249CFS G KC=0.024 4$LC=0.0050 7$MC=0.00122 17
249CFS G NC=0.00034 5$OC=8.7E-5 12$PC=1.68E-5 24$QC=9.6E-7 16$IPC=1.10E-5 17
249CF cG M$From |a(K)exp=0.0230 {I43}, |a(L1+L2)exp=0.0054 {I16}
249CF L 1238.05 17 (5/2-,7/2,9/2+)
249CF E 0.054 7 7.25 24 0.054 7
249CFS E CK=0.35 14$CL=0.45 9$CM+=0.20 5
249CF G 1093.2 3 0.031 6
249CF G 1238.0 2 0.023 3
249CF L 1267.7 4 (9/2-)
249CF E 0.037 7 7.2 3 0.037 7
249CFS E CK=0.22 17$CL=0.54 11$CM+=0.24 7
249CF G 1205.1 5 0.030 6 [M1,E2] 0.025 14
249CFS G KC=0.019 11$LC=0.0042 21$MC=1.0E-3 5
249CFS G NC=2.8E-4 14$OC=7.E-5 4$PC=1.4E-5 7$QC=8.E-7 5$IPC=7.E-6 4
249CF G 1267.8 5 0.006 2 [M1,E2] 0.022 12
249CFS G KC=0.017 10$LC=0.0037 18$MC=9.E-4 4
249CFS G NC=2.5E-4 12$OC=6.4E-5 31$PC=1.2E-5 6$QC=7.E-7 4$IPC=1.8E-5 10
249CF L 1304.30 30
249CF E 0.038 4 6.9 3 0.038 4
249CFS E CK=0.02 17$CL=0.66 10$CM+=0.32 7
249CF G 1304.3 3 0.038 4